if it rains, I won't go to the beach today.
Make me a cup of tea please!
If you heat water, it boils.
What's the difference between 'say' and 'tell'?
Will or Going To
What's the difference between a few and a little?
What's the difference between hear and listen?
See watch and look what's the difference?
at on in
What's the difference between present simple and present continuous?