Future plans (be going to)

I going am to attend a tennis match on Sunday.

They to have lunch together.

We are to get married.

We are going to get married.

They are going to have lunch together.

I am going to attend a tennis match on Sunday.

I going to take piano lessons on vacations.

Is going to sing a hole concert next year.

I am going to take piano lessons on vacations.

She is going to sing a hole concert next year.