1. She finds playing board games boring

- find sth adj

2. Lam would like to go fishing with his classmates 

- would like to Vnt

3. I am interested in reading novels

- be interested in Ving

4. Ha isn't as intelligent as Hoa

- S1 tobe not as adj as S2

5. She thinks playing badminton is exciting

- S think(s) S tobe adj.

--

1. didn't do

2. have Linh stayed

3. doesn't go

4. Are Nam and Ba kicking

5. haven't completed

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Thì HTTD diễn tả hành động đang xảy ra: S am/are/is V-ing

DHNB: at the moment, now, at present,...

Thì HTHT diễn tả hành động đã xảy ra trong quá khứ và có thể kéo dài đến HT/TL: S have/has VPII 

DHNB: already, since, for, just, already, so far,...

Thì QKĐ diễn tả một chuỗi hành động xảy ra trong quá khứ: S V-ed/C2

DHNB: last, yesterday, ago,..