1 these are 9 planets in the solar system sai David
-> David said that
2 I don’t have any money, so I cannot buy that book
-> If I
3 This is the first time they have seen this film
they
1 these are 9 planets in the solar system sai David
-> David said that
2 I don’t have any money, so I cannot buy that book
-> If I
3 This is the first time they have seen this film
they
1. David said that there were 9 planets in the solar system
2. If I had some money, I could buy that book
3. They haven’t seen this film before
1 these are 9 planets in the solar system sai David -> David said that there were 9 planets in the solar system(câu gián tiếp trog câu trần thuật)
2 I don’t have any money, so I cannot buy that book -> If I had money,i could buy that book(câu đk 2 ,bỏ any vì nó chỉ xuất hiện trog câu pđ)
3 This is the first time they have seen this film-> they have never seen this film before(S+has/have+never+Ved/c3…+before)