Explanation:
Yes, it can either be a command or advice depending on the context in which it is used
I need a more detailed explanation to help you.
Answer:
it is the 3 one and number 2 contains a comma splice
Explanation:
2.The dress is a bit big on her; my mother has made it stay with pins
3.The dress is a bit big on her. My mother has made it stay with pins.
it is supposed to be The dress is a bit big for her. My mother has made it stay with pins.
The prefix is "ad-" meaning "increase"