1. She is busy from Monday to Friday.
2. She is busy from Monday through Friday.
3. She is busy Monday to Friday.
4. She is busy Monday through Friday.
[Can we omit 'from'? are they all okay?]
5. She goes to the movies on Mondays.
6. She goes to the movies Mondays.
[Ae both okay? Can we delete 'on'?]
1 answer
One through four are all fine. Using "from" is preferable, but it is implied in three and four, so is often omitted. The same is true with five and six. "on" is implied in number six, but number five is better.
4 answers