Be going to: use

We use be going to when we refer to intentions and future plans that have already been decided.

NOTE: We can use gonna instead of going to in informal contexts.

Affirmative

• I am going to the shop this weekend.
• When he grows up, he is going to be the boss.
• We are going to visit your company today.

Negative

• I am not going to the shop this weekend.
• When he grows up, he is not going to be the boss.
• We are not going to visit your company today.

Interrogative

• Am I going to the shop this weekend?
• Is he going to be the boss when he grows up?
• Are we going to visit your company today?