那一句正確?

We buy some presents for them . (We help them to buy presents.)

We buy some presents to them . (We buy some presents as gifts to them.)

We buy some presents for them .

Of course is "We buy some presents to them "

We buy some presents for them .

係用 FOR。 但係你個 “BUY” 係 infinitive form。應該用 現在式 - are buying﹐ 過去式 - bought﹐將來式 - will buy ....等等...

eg - we are buying some presents for them.

We buy some presents for them .

We buy some presents for them.

If use (to) them,

We give/send some presents to them.

We buy some presents for them .

係:
We buy some presents to them .

We buy some presents for them .