${1.}$ Many trees was blown away by the hurricane yesterday.
→ bị động QKĐ: S + was/were (not) + v3/ed + (by+O) + time
${2.}$ She said she was going to visit Japan the following month.
→ S + said (that) + S + V(lùi thì): câu gián tiếp dạng trần thuật
${3.}$ Despite being tired, Jessica was still able to go to school.
→ Although + S + V, S + V: Mặc dù ... nhưng ....
= Despite/ In spite of + N/V_ing, S + V
${4.}$ If I were you, I would study harder.
→ đk loại 2 ( diễn tả 1 sự việc k thể xảy ra ở hiện tại): If + S + QKĐ ( đối với Vtobe thì ta dùng "were/weren't" ), S + would/could (not) + V0