どんなことになっても決してそれはしない。の英語

I will not do that for the life of me.

On no account will I do such a thing.

I won't give up no matter what happens.

I wouldn't do it for the world.

I wouldn't do that for the world.

You must not take it on any account.

In no case should you give up.

There is no knowing [telling] what may [will] happen.

There is no saying [telling, knowing] what may happen.

What may happen is anybody's [anyone's] guess.

There is no knowing what will happen.

I would not part with it for the whole world.

You mustn't do it no matter what.

You cannot have your way in everything.

You can't have your way in everything.

Even if something stupid happens, I won't give up.

No matter what happens, I won't give up.

go all [any, great] lengths＝go to any length(s) [great lengths]

There is nothing for you to be afraid of.

It can't be helped.

What is important is not what you do but the way you do it.

What is important is not what you do, but the way you do it.

Whatever may happen I'm quite all right.

Some circumstances must prevent his coming

Something must prevent his coming.

It will get you nowhere.

There are no circumstances that could justify it.

Whatever happens, I will do it.

I just don't know what to say.

It doesn't go well no matter what I do.