とどまることを知らないの英語

He is an utter stranger―a complete stranger―a perfect stranger―to me.

I do not know what to do

I am at a loss how to act.

the condition of not yet knowing

I do not know for certain.

I do not know well

I am not quite sure.

How should I know?

the state of being totally unfamiliar with something

I know nothing

I do not know anything.

He can not know them

It is impossible that he can know them.

I don't know why.

of a condition, ignorant of

I have no clue.

I have no idea.

I don't know anything at all.

I don't know anything about ～ .

You're asking the wrong person.

I wish I can help you, but I don't know

I can not say for certain

I do not know for a certainty.

My heart to such a mood;

He says he does not know.

I do not know it at all

I don't know

I don't rightly know.

of a person, the state of not knowing something

I don't know