Should Rahul talk to me?/
Shall Rahul talk to me?

He should have a pen./
He has to have a pen.

Who all shall I meet?/
Who all do I meet?

Everyone ought to speak the truth./
Everyone should speak the truth./
Everyone must speak the truth.

He should have at least something to speak./
He has to have at least something to speak.

He should have had at least something to speak. /
He had to have at least something to speak.

We should have at least 2 years’ experience./
We have to have at least 2 years’ experience.

We should have had at least 2 years’ experience. /
We had to have at least 2 years’ experience.

Why shall I not go there?/
Why do I not go there?

He should have had a good job./
He had to have a good job.

He must go there.

He must go to the hospital to see his father.

Should I go there? /
Shall I go there?

Shall I talk to him?/
Do I talk to him?

Shall I call you in the evening?/
Do I call you in the evening?