自分がなぜそれをしたのかわからない。の英語

I don't know why I did that.

Why he did it is beyond my comprehension.

I don't know what that is made with.

I don't understand why we have to do this.

I don't understand why I have to do this.

I cannot understand why you did that work.

I don't understand why that turned out like that.

I can't figure out why he did it.

I don't see why I should not do that.

I don't see why I shouldn't do that.

I don't know why that is either.

I don't know how it became like that.

I cannot figure out why he has done that.

I can't understand why he did that.

I can't conceive why she did such a thing.

I still can't understand why you did that work.

I do not know why I am like this.

I cannot imagine what made me say a thing like that.

I don't know why that is.

Don't you want to know why I didn't do that?

I see no reason why I shouldn't put it into practice.

I know why he did it.

I was at a loss [all at sea] (as to) what to do.

I don't know why we have to do so.

I can't explain why this happened.

I can't remember why I did that.

I can understand why you don't want to do that.

I'm ignorant (of) how it happened.

It is difficult to [We can't] understand why you did it.

I cannot conceive why she has done such a thing.