1. I suggest him use plastic bags to wrap food (suggest s.one (should) do s.th: đề xuất ai đó làm việc gì)

2. John told his mother that he didn't know how to do that exercise 

`->` Câu khẳng định/ phủ định: S + reported verb (said (to O)/ told s.one/... (that) + S + (not) + V(lùi thì)

`->` HTĐ `->` QKĐ

`->` Đổi chủ ngữ/vị ngữ: I `->` He (vì người nói là "John")

`->` this `->` that

3. This is the first time I have (ever) eaten this kind of food (This/It + is + the first time + S + have/has + (ever) + Vp.p = S + have/has + not/never + Vp.p + before)

4. I wish I had a computer at home (câu ước HTĐ `->` QKĐ: S + wish(es) + (that) + S + V_ed/2)

5. The lunch can be cooked very well (by her) (bị động với modal verbs: modal verb + be + Vp.p; she có thể được lược đi trong câu BĐ)

`1.` I suggest he should use plastic bags to wrap food

S + suggest + V_ing: gợi ý, đề nghị làm gì

S + suggest + S + should + V_inf: gợi ý, đề nghị ai nên làm gì

`2.` John told his mother that he didn't know how to do that exercise

S + told + O + (that) + S + V_lùi thì

Hiện tại đơn `→` Quá khứ đơn

`3.` This is the first time I have eaten this kind of food

This is the first time + S + has/ have + V_ed/ V3

`4.` I wish I had a computer at home

S + wish/ wishes + S + V_ed/ V2

`5.` The lunch can be cooked very well by her

S + modal verb (should, must, have to, can,...) + be + PP + (by O)