Grammar Rule

Examples

I speak English well.
I play tennis badly.
I do my homework correctly.

Remember!

To create adverbs we normally add -ly:
quick - quickly
slow - slowly

Be careful!

'good' is an adjective
'well' is an adverb
This is a good book.
I read well.

We say... We don’t say...

This is a good book. (NOT This is a well book.)
I read well. (NOT I read good.)