Two" is always a number - the number 2
For example: The two boys shivered in the cold.
"Too" can be used in 2 ways:
to mean "excessively" e.g. too far, too expensive
to mean "also" or "as well" e.g. Will you be skating too?
"To" is used in 2 ways:
to show direction e.g. He passed the ball to his brother
as part of a verb e.g. He wanted to read the new Harry Potter book.
See if you can choose the correct words to fill the gaps in the following sentences. Click on the button alongside a word to see if you're right.