If I hadn’t asked for his help, I would have failed again.

[diamondcutter]

1. If I hadn’t asked for his help, I would have failed again.
2. Had I not asked for his help, I would have failed again.
3. Hadn't I asked for his help, I would have failed again.
4. Having not asked for his help, I would have failed again.
5. Not having asked for his help, I would have failed again.
6. Without asking for his help, I would have failed again.
7. Without him to ask for help, I would have failed again.

I wrote these sentences. Do they all make sense and are they all exchangeable?

 

[jutfrank]

Definitely not. What do you mean exactly? The first two are fine, if it's a conditional statement you want to make.

 

[Tarheel]

"If I hadn't asked for his help I would have failed again."

That makes sense up to a point. Did you get the help you asked for?

 

[diamondcutter]

I want to express I got his help and I succeeded with his help.

 

[jutfrank]

I'm still not sure what you mean. Do you mean to say that your success was conditional upon getting his help? If so, 1 and 2 are okay. Or:

I would have failed again without his help.
I would have failed again if it hadn't been for his help.

I can't see why you seem to think it's the 'asking' rather than the help itself that really allowed you to succeed, so I didn't include that in my suggestions.

 

[Tarheel]

I want to express I got his help and I succeeded with his help.

My point is that the asking part is only part of it. Getting the help is more important.