be going to

Use: 
Use be going to to talk about your personal plans for the future.

I’m going to see my sister at the weekend.
Are you going to marry Paul?

Form:

1)  The form of the positive and negative sentences and questions is shown below.

Positive

I	am / ‘m	going to	verb (infinitive form)
you	are / ‘re
he / she / it	is / ‘s
we	are / ‘re
they	are / ‘re

Negative

I	‘m not	going  to	verb (infinitive form)
you	aren’t    OR   ‘re not
he / she / it	isn’t OR     ‘s not
we	aren’t    OR   ‘re not
they	aren’t    OR   ‘re not

Questions

Am	I	going  to	verb (infinitive form) ?
Are	you
Is	he / she / it
Are	we
Are	they

2)  The short reply to a ‘be going to’ question is ‘Yes, I am’, ‘Yes, she is’ etc. You cannot contract these short sentences.
Yes, he’s. =>  Yes, he is.

The short negative replies are:
No, I’m not.
No, you’re not / No, you aren’t.      
No, he’s not / No he isn’t. No, she’s not / No she isn’t. No, it’s not / no it isn’t.
No, we’re not / No, we aren’t.
No, they’re not / No, they aren’t.

Common mistakes:

1)  Some students forget to add the verb ’be’ before ‘going to’.

I going to see my friends tonight.   =>  I’m going to see my friends tonight.

2) Some students forget to invert the subject and be in questions.

What time you are going to leave? =>  What time are you going to leave?