I don't know if/Is it okay if/Do you mind if/I'm afraid that/It is likely that

I don't know if it is true.

I don't know if I am a genius.

I don't know if he is stupid.

I don't know if I am an animal.

I don't know if he is a genius.

 

Is it okay if I go there?

Is it okay if I talk?

Is it okay if go to bed later?

Is it okay if play the game?

Is it okay if open the window?

 

Do you mind if open the window?

Do you mind if go to bed later?

Do you mind if play the game?

Do you mind if I talk?

Do you mind if I go there?

 

I'm afraid that you don't have to.

I'm afraid that I can't accept the offer.

I'm afraid that your argument doesn't fit the topic.

I'm afraid that go there.

I'm afraid that I won’t be able to attend the meeting.

 

It likely comes true.

I likely win first place.

It is likely real.

We will likely lose.

I am likely dying.