$1.$ They / visited / Ha Long Bay / many times.

$→$ They have visited Ha Long Bay for many times. (Thì Hiện Tại Hoàn Thành)

$2.$ My brother / not like / ice-skating / because he thinks / it/ dangerous.

$→$ My brother doesn't like ice-skating because he thinks it is dangerous. (Thì Hiện Tại Đơn)

$3.$ We / already / ask / people / donate / books / clothes / children.

$→$ We have already asked people for donating books and clothes for children. (Thì Hiện Tại Hoàn Thành)

$4.$ I / not like / eat / junk food / because / it / not be / good / my health.

$→$ I don't like eating junk food because it isn't good for my health. (Thì Hiện Tại Đơn)

$Chúc$ $bạn$ $học$ $tốt!$

` 1 ` : They have visited Ha Long Pay many times

` -> `  S + have / has + VPII

DHNB : many times

` 2 `  : My brother doesn't like ice - skating because he thinks it is dangerous

` -> ` S + don't /doesn't + V nguyên mẫu

` -> `  S + think + V-ing / N + is + adj

` 3 `  : We have already asked peop;e to donetae books and clothes for children 

` -> `  S + have / has + VPII

DHNB : already

` 4 `  : I don't lile  eating junk food because it is not good for my healthy

` -> ` S + don't /doesn't + V nguyên mẫu