英和和英

make certain of

make sure of

to make certain

Is that certain!

Are you sure of it?

Assuming that's the case

a sure way

cause to feel sure

in order to make sure

It is certain.

When you consider that

definitely

as a matter of course

Is that certain?

Are you sure of it?

That would be the better way.

to decide definitely

something that should be a certain way

If it's that kind of thing

Affirmatively

positively

a state of inevitability

surely

surely

exactly

to be convinced

I think it is so.

Confirmed

It must be so.

a dead certainty