is and are, mail and mails, on or in the bus

[Ju]

1. There aren't any mails in the mail box.

For the above sentence, I would correct it to:
There isn't any mail in the mail box

************************************

2. There are no mails in the mail box.

For the above sentence, I would correct it to:
There is no mail in the mail box.

***************************************

3. There is a boy in the bus.

For the above sentence, I would correct it to:
There is a boy on the bus.

**************************************


Am I right?

Thank you.

[emsr2d2]

1. There aren't any mails in the mail box.

For the above sentence, I would correct it to:
There isn't any mail in the mail box.



2. There are no mails in the mail box.

For the above sentence, I would correct it to:
There is no mail in the mail box.



3. There is a boy in the bus.

For the above sentence, I would correct it to:
There is a boy on the bus.




Am I right?

Thank you.

I have marked all of your corrections as correct but bear in mind they are for BrE. I think "There is a boy in the bus" might be OK in AmE.

[Barb_D]

In a car, on a bus.

[billmcd]

I have marked all of your corrections as correct but bear in mind they are for BrE. I think "There is a boy in the bus" might be OK in AmE. In some circumstances, possibly, but most often "on".

b.