+0
Are the following sentences correct?

1) If only I had a big car.

2) I wish I had some money.

3) I wish I could be able to sleep.

4) I wish it didn't rain.

5) I should've refueled (put more fuel in the car)

6) I'd rather she stopped playing that piano.
Comments  
ElectroAre the following sentences correct?

1) If only I had a big car.

2) I wish I had some money.

3) I wish I could be able to sleep.

4) I wish it didn't rain.

5) I should've refueled (put more fuel in the car)

6) I'd rather she stopped playing that piano.

I think I wouldn't call any of these "conditionals", with the exception of # 1. I see a conditional sentence as one in which a statement is made with a proviso: if it rains, I'll cancel the trip; if I were you, I wouldn't go; if she had known that earlier, she wouldn't have trusted him.

In # 1, the statement is intended, the "big car" being the condition.
They're all correct. Emotion: smile
Teachers: We supply a list of EFL job vacancies
A couple of these don't sound quite right to my (British) ears.

3) I wish I could be able to sleep.

I would say, "I wish I was able to sleep", or "I wish I could get to sleep". Trying it out to myself with a conditional "I wish I were able to sleep" just sounds weird.

4) I wish it didn't rain.

"I wish it wouldn't rain"
Hi LRR

I agree with you on I wish I could be able to sleep being incorrect. Could and be don't go together.
Grammarians want us to say I wish I were able to sleep, but the informal I wish I was able to sleep is gaining ground.

I wish it wouldn't rain is correct if the reference is to the future: I wish it wouldn't rain tomorrow.
If the reference is not to the future: I wish it didn't rain now. Or: I wish it weren't raining now.

Cheers
CB
6) I'd rather she stopped playing that piano.incorrect

I would rather she wouldn't play that piano ....

there is complaining here..for example:
I would rather you wouldn't eat with your mouth open.
Students: We have free audio pronunciation exercises.
Anonymous6) I'd rather she stopped playing that piano.incorrect

I'd rather she stopped playing that piano is correct.
CB