there is/are going to

There is/are going to be more buses on this line.

Which form of Be is correct? why? Thanks.

Thanks. But "buses" follows the verb infinitive "be" :

There is/are going to be more buses on this line.          In this sample sentence, "be" remains infinitive regardless the number of the noun that follows.

Did you mean that because "buses" is plural, the "be" that follows "There" should be "are" accordingly? I thought that "buses" is proceeded by "be" infinitive, and thus "buses" does not control the form of "be" in the structure "There be".

Dear Chariot,

Besides 'will' , we also use 'be going to' to express future.

EX:
Now:
- I play ...
- he draws ...
- there is a bus ...
- there are buses ...

Future:
- I am going to play ...
- he is going to draw ... 
- there is going to be a bus ...
- there are going to be buses ...

Hope that helps,
Hoa Thai
              

Which form of Be is correct? why?

are, because the verb in a there construction must agree in number with the following noun(s).
(going, to, be, and more, which come between the main verb and the noun buses, are not nouns.)

Hence, the correct agreement is as shown below.

There are buses.
There are beautiful buses.
There are very big buses.
There are going to be buses.
There are bound to be buses.
There are sure to be buses.
There are certain to be buses.
There are supposed to be buses.
There are to be buses.
There have to be buses.
There seem to be buses.

There is a bus.
There is a beautiful bus.
There is a very big bus.
There is going to be a bus.
There is bound to be a bus.
There is sure to be a bus.
There is certain to be a bus.
There is supposed to be a bus.
There is to be a bus.
There has to be a bus.
There seems to be a bus.

CJ