We started learning  english when  we were in grade

1. we started learning  english when  we were in grade3
-> we have
2. ba doesn't learn hard so his marks at school are always bad
-> if
3. "please , come to see us whenever you have free time , mary" daisy said
-> daisy invited
4. the children are listening to music in their school
-> music
VIẾT LẠI CÂU