1. Yesterday, she went shopping, then she visited me.

→ Yesterday, before she visited me, she had gone shopping.

2. Someone had stole my car before I wake up.

→ My car had been stolen before I wake up.

3. My homework is long and difficult, I can't finish it on time.

→ If my homework weren't long and difficult, I could finish it on time.

4. I can not come because I have to help my dad with something.

→ If I didn't have to help my dad with something, I could come.

< Có gì sai thì nói mk sửa nhé ạ >

1 Yesterday, before she visited me, she had gone shopping. ( before + quá khứ đơn, quá khứ tiếp diễn )

2 My car had been stolen before I wake up. ( bị động quá khứ hoàn thành: S + had + been + Vpp )

3 If my homework weren't long and difficult, I could finish it on time. ( If 2: If + S1 + V2/ed, S + would + Vinf )

4 If I didn't have to help my dad with something, I could come. ( If 2: If + S1 + V2/ed, S + would + Vinf )