`1`.They let him to use their car
$\text{(Let S.O do S.T)}$
`2`.After the train had left,he arrived at the station.
$\text{(After+S+Past perfect+S+V(ed/2)}$
`3`.Peter and Maria decided to go to the cinema.
$\text{(Decide+to-inf)}$
`4`.Would you like a cup of coffee ?
$\text{(Would you like+N)}$
`5`.Before she went to school,she had done homework.
$\text{(Before+S+V(ed/2),S+Past perfect)}$
`6`.We want to play football with our close friends at weekends.
$\text{(Want+to-inf)}$
`7`.It is very nice to meet your parents
$\text{(S+Be+Adj+to-inf)}$
$\text{@TriLeCongTri}$
$\text{chúc bạn học tốt!!!!!}$