When I (arrived/ had arrived) at the cinema, the film had started.
arrived
You (had better/ should) ask a doctor about it. It could be a serious problem.
had better
After Max had finished his breakfast, he (left/ had left) for work.
left
Before Salem ran to Ali's house, he (had phoned/ phoned) him.
had phoned
You (should/ shouldn't) eat too many sweets. They are bad for your teeth.
shouldn't
I (has finished/ have finished) work since 3 O' clock.
have finished
My sister (had finished/ finished) her homework by eight O'clock.
had finished
(Could/ Should) I borrow some money? I want to buy something to eat.
Could
I think you ought to (tell/ told) your mum about it.
tell
The presentation had started. Then, I arrived. (Use: when)
The presentation had started when I arrived.
