Grammar Wish, Past simple vs past continuous

I don't understand this point of grammar. I wish I ______ it better.

• had understood

• would understand

• understood

• understands

I speak terrible English. I wish I ______ English well.

• had spoken

• speaks

• would speak

• spoke

I wish you __________ here with me.

• have been

• were

• was

• am

They wish they __________ a new car.

• had

• has

• would have

• have

Lan can’t swim fast. She wishes she __________ faster.

• can swim

• can't swim

• couldn't swim

• could swim

I went out in the rain and now I have a bad cold. I wish I ______ out.

• didn't go

• hadn't gone

• wouldn't go

• went

I like my chief but I wish he ______ me some more responsibility soon.

• had given

• gave

• would give

Sometimes I wish I ______.

• could fly

• have fly

• flew

My car is too small. I wish I ______ a bigger one.

• would have

• have

• had

I wish I _____________ hard-working.

• am

• will be

• were