The Infinitive without to
||He can run very fast.
||As a boy he could run very fast.
||I may fly to Africa this summer.
||I might fly to Africa this summer.
||I must go now.
||You mustn't smoke here.
||You needn't go.
||We shall sing a song.
||We should sing a song.
||She will cook a meal for his birthday.
||She would cook a meal for his birthday.
after to do
after the following expressions:
||You had better clean up your room.
||Susan would rather study for her exam tomorrow.
||I would sooner read a book than watch this film.
||Why not ask your neighbour for help?
|why should we
||Why should we go by car?
|why should we not
||Why should we not go by car?
after verbs of perception + object (action has finished):
||She feels the rain fall on her face.
||I heard Peter sing a song.
||Mandy noticed the boy climb the tree.
||They saw him climb up the roof.
||He watched the thieves steal a car.
after let + object:
||Sandy let her child go out alone.
|Mother let her daughter decide on her own.
||Let's go for a walk through the park.
after make + object:
||She made Peggy and Samantha clean the room.