3. Nam always looks as if he _______ no time to sleep. He’s always sleepy.
a. have b. had c. has d. is having
5. I don’t like Nick. He talks as if he _______ everything.
a. knew b. had known c. knows d. will know
* 2 câu trên đều chung một cấu trức đó là câu điều kiện loại 1