Five years ago, I (cannot, couldn't) play the piano.
Five years ago, I couldn't play the piano.
You (should, can) stop smoking.
You should stop smoking.
I think I (will, would) go to the beach this Sunday.
I think I will go to the beach this Sunday.
The keys (could, should) be on the table.
The keys could be on the table.
(Could, Should) I leave early today, please?
Could I leave early today, please?
We (can, could) speak English well.
We can speak English well.
Children (must, could) do their homework.
Children must do their homework.
I am feeling tired. I think I (would, will) go to sleep now.
I am feeling tired. I think I will go to sleep now.
Time is not on our side. We (must, can) hurry.
Time is not on our side. We must hurry.
You (shouldn't, may not) use my car tonight.
You may not use my car tonight.
The volleyball team (should, could) go to the Olympics this year if they are lucky.
The volleyball team could go to the Olympics this year if they are lucky.
There is a small chance that we (have to, can) wear a uniform at work.
There is a small chance that we have to wear a uniform at work.
I (will, would) try to act like my father when I was young.
I would try to act like my father when I was young.
It is snowing, so it (can, must) be very cold outside.
It is snowing, so it (can, must) be very cold outside.
(May, Would) I help you?
May I help you?
I (cannot, couldn't) run that fast when I was six years old.
I couldn't run that fast when I was six years old.
You (should, can) save some money.
You should save some money.
If you get in trouble, I (won't, wouldn't) help you.
If you get in trouble, I won't help you.
I don't know where John is. He (could, should) have missed the train.
I don't know where John is. He could have missed the train.
(Can, Will) we swim in the lake?
Can we swim in the lake?
I think I (can, must) help you learn math if you study hard.
I think I can help you learn math if you study hard.
I (must, can) study today.
I must study today.
John (will, would) always be late.
John would always be late.
She (might, couldn't) come soon.
She might come soon.
You (may, would) use a pencil to complete this test.
You may use a pencil to complete this test.