1 Students mustn't eat in the lecture halls:it's not allowed.
2 It's raining out. You should take an umbrella.
3 Why didn't she tell us about her problems? We could help her.
4 Nick didn't need (didn't have to) to take the bus because his cousin offered to give him a lift.
5 Soldiers must obey without question.
6 He must be working in library now. I've just seen him.
7 You needn't have come here to tell me. You could call me instead.
8 I had no key, I had to wake my mother and she let me in.
9 I'm so tired, I really should/need to go to bed now.
10 Despite playing under strength, the team could beat their riveals.
I am busy now. I am doing my homework.
I can help you. I am free now. I have done my homework.
Look! little Johny is washing his bike. He is funny, isn't he.
Little Johny has washed his bike. Now the bike is clean.
I am learning new word now.
I have learnt words and I can go with you.
I have read the story. i think I can answer your questions about it.
I am reading the story now. We can discuss it later.
Mary is busy. She buys a present for her sister.
She has bought a present for her sister. She can go to the bookshop now.
Horses are animals.
Balls are toys.
Those novels are brilliant.
Girls wear dresses.
Hungry boys eat large dinners.
Nouns are words.
These men have wives.
Children are boys and girls.
These classrooms have blackboards.
Dentists pull out teeth.
You should watch this movie.
I have to buy some potatoes.
The part I love most is they need me more than they hate me.
She can cook the most delicious cakes.
We must stand together.
Were-be
thought-think
was-be
wrote-write
could-can
went-go
came-come
see-saw
took-take
ran-ran
get
told-tell
gave-give
said-say
в первой колонке вторая форма ,а во второй первичная форма глагола.