Modal Verbs (could, should, may, must)

تانية بكالوريا English

الدرس ده عن إيه؟

Modal verbs (can, could, should, ought to, may, might, must) are special helping verbs. We use them to present facts carefully, to evaluate evidence and to make recommendations.

الدرس ده عن أفعال صغيرة بتيجي قبل الفعل الأساسي وبتغيّر «طعم» الجملة: هل الحاجة ممكنة؟ ولا لازم؟ ولا أنا بنصحك بيها؟ ولا أنا مش متأكد؟

في الكتاب الدرس ده في Unit 5: The Greenhouse Effect، جزء Grammar Focus: Modal verbs to present facts carefully and evaluate evidence (صفحة 154-155)، ومرتبط بالـ podcast عن الطاقة المتجددة، وبعدها بتستخدمها في كتابة الـ Informational Leaflet. الكتاب بيقول: استخدم الـ modals علشان متكتبش كل حاجة كأنها حقيقة مطلقة (Avoid stating everything as absolute fact).

الفكرة ببساطة: «درجة التأكيد»

Modals show how sure we are, or how strong our advice is. Compare: *Solar energy* solves *the problem* (100% fact) and *Solar energy* may solve *the problem* (possible, not certain).

تخيّل إن عندك «عدّاد ثقة». لما تقول «الطاقة الشمسية هتحل المشكلة» إنت متأكد 100%. لكن العلماء والكتّاب المحترمين بيقولوا «الطاقة الشمسية ممكن تحل المشكلة» لأن المستقبل مش مؤكد. ده اسمه hedging (يعني: إنك تخفف كلامك وتتكلم بحذر علشان تبقى دقيق).

• Battery storage solves the problem of intermittency.كأنها حقيقة مؤكدة 100%. ده كلام قوي زيادة لو لسه فيه بحث.
• Battery storage may solve the problem of intermittency.ممكن تحلها، بس مش أكيد. ده كلام حذر ودقيق (hedge). intermittency = إن الطاقة مش بتيجي طول الوقت، زي الشمس بالليل.

القواعد الذهبية للـ Modals

Modals never change their form: no -s, no -ed, no -ing. After a modal we use the base verb (infinitive without *to*). To make the negative add not. To make a question move the modal before the subject.

كل Modal ومعناه (جدول الكتاب + شرح زيادة)

The book groups modals by function: possibility or potential, recommendations, uncertainty, and strong necessity.

رتّبهم كده من الأضعف للأقوى في الاحتمال: might ← may / could ← can ← (فعل عادي = حقيقة). وفي الإلزام: should / ought to (نصيحة) ← must (لازم).

أمثلة من موضوعات الوحدة

• Egypt can produce huge amounts of solar power because it is sunny most of the year.مصر تقدر تنتج طاقة شمسية كتير. can = قدرة مؤكدة.
• Electric buses could reduce air pollution in Cairo.الأتوبيسات الكهربا ممكن تقلل تلوث الهوا في القاهرة. إمكانية في المستقبل.
• Experts believe electric cars may become the global standard within a decade.الخبراء شايفين إن العربيات الكهربا يمكن تبقى هي الأساس. مش أكيد.
• Rising seas might affect some villages in the Delta.ارتفاع البحر ممكن يأثر على قرى في الدلتا. احتمال أضعف.
• Schools should consider installing solar panels on their roofs.المدارس المفروض تفكر تركّب ألواح شمسية. نصيحة.
• Young people ought to turn off lights when they leave a room.الشباب ينبغي يطفوا النور. نفس معنى should.
• We must act now to protect future generations.لازم نتحرك دلوقتي. ضرورة ومستعجل.
• Factories must not dump waste into the Nile.ممنوع المصانع ترمي مخلفات في النيل. must not = ممنوع.
• Solar panels cannot produce electricity at night, so we need batteries to store energy.الألواح الشمسية مش بتقدر تنتج كهربا بالليل، علشان كده محتاجين بطاريات تخزّن الطاقة.
• Should governments ban plastic bags?سؤال: هل المفروض الحكومات تمنع الأكياس البلاستيك؟ should قبل الفاعل.

فروق مهمة لازم تعرفها

Some pairs look similar but mean different things: must not vs do not have to, can vs could, may vs must (for deduction).

ولو عايز تتكلم عن الماضي بنفس الأفكار، بنستخدم modal + have + التصريف التالت:

• We should have planted more trees years ago.كان المفروض نزرع شجر أكتر من سنين (ومعملناش). ندم على الماضي.
• The floods could have been worse.الفيضانات كان ممكن تبقى أسوأ (بس محصلش).
• The ice may have melted because of the heat wave.الجليد يمكن يكون داب بسبب موجة الحر. احتمال عن الماضي.

إزاي تستخدمها في الـ Leaflet والـ Argument

In a leaflet, use should / can for friendly advice and must for urgent calls to action. In an argument, use may / could to hedge claims and evaluate evidence carefully.

الكتاب عايزك تستخدم الـ modals في حاجتين:

• الـ Leaflet: نصيحة ودودة (You should… / You can start small…) وفي الـ call to action ممكن must للتأكيد.
• تقييم الأدلة والـ JRE: بدل ما تقول «solar is the best» قول «solar may be the most important source at the moment» علشان تبقى دقيق ومتوازن.

The sun shines on Egypt almost every day. Why not use it? Solar panels can turn sunlight into electricity for your home. Extra energy may even be sold back to the grid. You should talk to your parents or your school about rooftop panels. If you are not ready for that, you could start small with a solar charger. The climate crisis is your generation's challenge, so we must act today!

لاحظ: can = قدرة مؤكدة، may = احتمال، should = نصيحة، could = اقتراح خيار، must = حاجة مستعجلة.

إزاي بييجي في الأسئلة؟

الأسئلة في الكتاب والمراجعات بتيجي بالأشكال دي:

1) Complete with the correct modal verb. (زي تمرين الكتاب، والمعنى بين قوسين)

Planting trees in cities ______ (possibility) lower summer temperatures, although results differ from place to place.

الإجابة: may / could. ليه؟ المعنى احتمال، وكمان الجملة قالت «although results differ» يعني مش أكيد.

2) Only one sentence in each group is grammatically correct. Choose the correct answer.

a. Governments must investing in clean energy.

b. Governments must to invest in clean energy.

c. Governments must invest in clean energy.

d. Governments musts invest in clean energy.

الإجابة: c. بعد must مصدر من غير to ومن غير ing، وmust مبتاخدش s.

3) Rewrite the sentence more carefully using a modal verb. (hedging)

Solar energy is the answer to all of Egypt's energy problems.

الإجابة: Solar energy could / may be an important answer to many of Egypt's energy problems. ليه؟ الجملة الأصلية مبالغة (كل المشاكل). الـ modal خلاها حذرة ودقيقة زي ما الكتاب بيطلب.

تدريب

A. Complete with the correct modal verb (the meaning is given in brackets).

1. 1. Solar panels ______ (ability) produce electricity even on cloudy days, but less of it.

   Show answer

   can — قدرة مؤكدة.

2. 2. Every school ______ (advice) have a recycling bin in each classroom.

   Show answer

   should / ought to — نصيحة.

3. 3. Rising temperatures ______ (possibility) cause more water shortages in the future, although scientists are still studying this.

   Show answer

   may / might / could — احتمال ومش مؤكد (still studying).

4. 4. The world ______ (strong necessity) cut carbon emissions now to avoid disaster.

   Show answer

   must — ضرورة ومستعجلة (now).

5. 5. Visitors ______ (prohibition) throw plastic into the sea.

   Show answer

   must not / mustn't — ممنوع.

6. 6. You ______ (no necessity) buy an electric car to help the planet. Walking and cycling help too.

   Show answer

   don't have to — مش لازم.

B. Choose the correct answer from a, b, c or d.

1. 7. Wind turbines ______ enough electricity for thousands of homes. a. can generates b. can generate c. can to generate d. can generating

   Show answer

   b — بعد can مصدر.

2. 8. Experts say electric cars ______ become common in Egypt within ten years, but this is not certain. a. must b. may c. mustn't d. have to

   Show answer

   b. may — مش مؤكد = احتمال.

3. 9. ______ we use solar energy at night? a. Do we can b. Can c. Are d. Does

   Show answer

   b. Can — السؤال: modal قبل الفاعل.

4. 10. People ______ waste water, especially in hot summers. a. shouldn't b. don't should c. not should d. shouldn't to

   Show answer

   a. shouldn't — النفي = should + not.

5. 11. Look at the black smoke from that factory. It ______ be very harmful to people nearby. a. must b. mustn't c. ought d. don't have to

   Show answer

   a. must — استنتاج من دليل (black smoke) = أكيد.

6. 12. Ten years ago, we ______ started recycling, but we didn't. a. should b. should have c. must d. can

   Show answer

   b. should have — ندم على الماضي: should have + started.

C. Only one sentence in each group is grammatically correct. Choose the correct answer.

1. 13. a. The government musts protect the coast. b. The government must protects the coast. c. The government must protect the coast. d. The government must to protect the coast.

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   c — must + مصدر، ومن غير s.

2. 14. a. Schools ought install solar panels. b. Schools ought to install solar panels. c. Schools ought to installing solar panels. d. Schools oughts to install solar panels.

   Show answer

   b — ought to + مصدر.

3. 15. a. Battery storage may solves the problem. b. Battery storage may solve the problem. c. Battery storage mays solve the problem. d. Battery storage may to solve the problem.

   Show answer

   b — may + مصدر.

4. 16. a. Do households should switch to solar? b. Should households switch to solar? c. Should households to switch to solar? d. Households should switch to solar?

   Show answer

   b — سؤال: Should + فاعل + مصدر. (d) جملة خبرية مش سؤال صح.

D. Rewrite, correct or write as asked.

1. 17. Rewrite more carefully (hedge): Plastic bans will end ocean pollution.

   Show answer

   Plastic bans could / may reduce ocean pollution. — بدّلنا will بـ could/may، وend بـ reduce علشان منبالغش.

2. 18. Rewrite using should: It is a good idea for families to unplug devices at night.

   Show answer

   Families should unplug devices at night. — a good idea = نصيحة = should.

3. 19. Rewrite using must: It is necessary for factories to reduce their emissions.

   Show answer

   Factories must reduce their emissions. — necessary = must.

4. 20. Find and correct the mistake: Young people can to make a real difference.

   Show answer

   شيل to: Young people can make a real difference.

5. 21. Find and correct the mistake: You mustn't recycle at home, but it is very helpful.

   Show answer

   mustn't ← don't have to: You don't have to recycle at home, but it is very helpful. — المعنى «مش لازم» مش «ممنوع».

6. 22. Write a call to action for a leaflet about saving electricity. Use TWO modal verbs.

   Show answer

   مثال: You can save energy by switching off lights. You should start today and tell your friends! — can = قدرة، should = نصيحة.

7. 23. JRE: Is solar energy the most useful renewable source for Egypt today? Use at least TWO modals.

   Show answer

   مثال: Justify: Solar energy may be the most important renewable source at the moment. Reason: It is the fastest growing, and its cost has fallen sharply. Evidence: In Egypt, the Benban Solar Park already supplies electricity to many homes. However, without batteries it cannot supply power at night, so we should also invest in wind energy. — may = حذر، cannot = حدود، should = توصية.