will/shall

will

We use will for the future (tomorrow / next week etc.) 一般未来时

We do not use will for things we have already arranged or decided to do

We’re going to the cinema on Saturday. Do you want to come with us? (not We will go)

I’m not working tomorrow. (not I won’t work)
Are you going to do the exam? (not Will you do)

There’s a good film on TV tonight. I’m going to watch it. (not I’ll watch)
What are you doing at the weekend? (notWhat will you do)

You can use I’ll … (I will) when you offer something or decide to do something:
‘My bag is very heavy.’ ‘I’ll carry it for you.’
‘I’ll phone you tomorrow, OK?’ ‘OK, bye.’
We often say I think I’ll … / I don’t think I’ll … when we decide to do something:
I ‘ m tired. I think I’ll go to bed early tonight.
It’s a nice day. I think I’ll sit outside.
It’s raining. I don’t think I’ll go out.

Do not use I’ll … for something you decided before

shall

You can say I shall (= I will) and we shall(= we will):

I shall be late tomorrow. or l will (I’ll) be late tomorrow.
o I think we shall win. or I think we will (we’ll) win.

But do not use shall with you/they/he/she/it:
o Tom wil) be late. (11otTom shall be)

Shall I / Shall we … ?

= Do you think this is a good thing to do? Do you think this is a good idea?

It’s very warm in this room. Shall I open the window?
‘Shall I phone you this evening?’ ‘Yes, please.’
I’ m going to a party tonight. What shall I wear?
It’s a nice day. Shall we go for a walk?
Where shall we go for our holidays this year?
‘Let’s go out this evening.’ ‘OK, what time shall we meet?’