پاورپوینت گرامر و رایتینگ درس چهارم زبان کلاس دهم

Can:
1. It shows that something is possible or allowed, or that somebody has the ability to do something.
 We can‘t see the lake from the window./  It can get very hot this evening.
 Can I go to the cinema?
 I can’t swim well.
2. It is also used to ask people to do something, asking for things or asking to do things, (request).
 Can you wait a moment, please?
Can I have these postcards, please? (in a gift shop)
 Hello, can I speak to Tom, please? (on the phone)
3. Offering to do things.
 “Can I get you a cup of tea?”   “Yes, It would be very nice.”
may:
1. It shows that something is a possibility/ or It shows possible action or happening in the future.
 Where is Mina?  She may be in her office.
 Take an umbrella with you. It may rain today.
 She may not come to the party.
2. It is used to request/ grant permission.
 May I use your pen?   “Yes, you may.”
 May I leave the class?   “sure.”
3. Polite suggestion.
 “May I help you?”   “Yes, of course.”
must:
1. It is used to express strong obligation.
 She must be in bed because she has a flu.
 Peter mustn’t smoke anymore.
2. It shows that we feel sure something is or is not true.
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