1. Can you give me an example
how to use them?
(This doesn't sound right?)
2. Can you give me an example,
how to use them?
(It this correct with the comma? If not, why?)
The error is called a comma-splice: Two sentences joined by a comma.
3. Can you give me an example
on how to use them?
4. Can you give me an example
about how to use them?
Spelling: ex
ample with an "a". :wink: