`1` We have collected old clothes for our charity programme since last week .

`->` S + has / have + Vpp+ ....since + mốc thời gian

`2` We might be able to the moon for our summer holiday in 2050 .

`3` Were there forty students in your class two years ago ? 

`->` Be there + số lượng + N (s-es) + địa điểm...

`4` If your father doesn't leave right away , he will miss the train.

`->` Câu điều kiện loại 1 

If + mệnh đề hiện tại đơn, S will + V + O 

Unless = If....not 

@ Nấm lùn 🍄

1. We started to collect old clothes for our charity programme last week.

-> We have collected old clothers for our charity programme since last week.

2. We will probably go to the moon for our summer holidays in 2050.

-> We might go to the moon for our summer holiday in 2050 

3. Did your class have forty students two years ago?

-> Were forty students in your class two years ago?

4. Unless your father leaves right away, he will miss the train.

-> If your father doesn't leave right away , he will miss the train

Chỉ cần áp dụng công thức

S + has/have + Vpp + ... since + mốc thời gian

If + HTD, S will + V + O 

Be there + số lượng + Ns-es + address