1. If I was you, I would study hard to get better marks.

2. we will decide to have a video conference to discuss the project  next week.

3. Many houses were isolated in the vilage by the flood for amost a week.

4. John said he couldn't go out because he was working then.

1. If I were you, I would study hard to get better marks.

→ câu ĐK loại 2 ( diễn tả 1 hành động k thể xảy ra trong hiện tại hoặc tương lai ): If + S + QKĐ ( đối với Vbe thì ta chỉ sử dụng 'were' cho mọi chủ ngữ ), S + woul/could + V0

2. We will decide to have a video conference to discuss about the project next week.

3. Many houses were isolated in the vilage by the flood for amost a week.

→ S + was/were + V3/ed + by + O: câu bị động thì QKĐ

4. John said he couldn't go out because he was working then.

→ S + said (that) + S + V(lùi thì) ( ở vế 1, lùi từ 'can' → 'could'; ở vế 2 lùi thì HTTD → QKTD - 'now' → 'then' )

@ $quynhly$