I have hung the children's clothes out to dry.

I have hung the children's' clothes out to dry.

I have hung the childrens' clothes out to dry.

Nothing! (again)

The comma is not right.

You should spell "summer" with a capital "S".

It should be "Now AS ..." and not "Now THAT..."

Nothing.

It should be "fewer" employees.

I must do my grammar practice.

I must do my grammer practice

I must do my grammar practise.

Both are correct.

I was sitting next to John in the exam.

I was sat next to John in the exam

It is a guillemet.

It is an eroteme.

It is an interrobang.

The number of registered Moodle sites in the world is constantly increasing.

The amount of registered Moodle sites in the world is consistently increasing.

The amount of registered Moodle sites in the world is constantly increasing.

Nothing - it looks good to me.

It is sexist

Ugh! The most famous split infinitive in history - you shouldn't have anyting between "to" and "go".

John gave the book to Susan and I.

John gave the book to Susan and me

John gave the book to me and Susan