萨德系统的雷达:三到小英文题

1.Don't send a note if you are sick.(not have to)
You don't have to send a note if you are sick.

2.Do not join too many other school clubs.(ought not to)
You ought not to join too many other school clubs.

3.Think hard about whether you want to be a club member.(should)
Think hard about whether you should be a club member

you don't send a note if you are sick
you don't ought to join too many other school clubs.
you should think hard about whether you want to be club member.

1 You do not have to send a note if you are sick.
2 You ought not to join too many other school clubs.
3 You should think hard about whether you want to be club member.

六年级英语就这么难了?

you haven't sent me a note if you were sick
you ought not to join too many other school clubs
you should think hard whether you want to be a club member