Tongue Twister

Make sure you get every single word right!

Read the following and then see further down for
more instructions at the end. Read this a bit loud to yourself now:-

This is this cat
This is is cat
This is how cat
This is to cat
This is keep cat
This is a cat
This is fool cat
This is busy cat
This is for cat
This is forty cat
This is seconds cat..

Now read the THIRD word in each line then you will understand what is funny in this.