Will you let him go home?

Increase the speed.

I will come back tomorrow.

She is not going for a walk.

I did not call you.

Don’t get nervous before the audience.

Either you are wrong or he is.

Use aane do.
Let him come.

Increase the speed of the fan. /
Speed up the fan.

He will come back in a day or two. /
He will be back in a day or two.