18. I didn’t know the answer, so I couldn’t tell you.
→If._________________________________________________
19. I was able to come in time because Jane gave me a lift. →If._________________________________________________
18. I didn’t know the answer, so I couldn’t tell you. →If._________________________________________________ 19. I was able to come in time because J
By Mary
`->`
18 . If I had known the answer , I could have told you
( Câu đk loại 3 , vế if là had + Pii , mệnh đề chính chia động từ khuyết thuyết ở dạng quá khứ + have + Pii+..)
19 . If Jane hadn’t given me a lift , I wouldn’t have been able to come in time
( Câu đk loại 3 )
$#Minh$
18. f I knew the answer, I would tell you
19. If I came in time,Jane would give me a lift
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