1.I am so sorry for having yelling at you that day.
2.It's 7 o'clock.You needn't to be here so early.
3.I won't go there unless I have been invited.
4.You must be careful while crossing the street.
5.I don't believe this reason for being late.
6.I will write down what I have heard about.
7.She is keen on stamp collection.
8.I didn't mean to do that.
9.I went into the room quitely so as not to wake the baby up.
10.I get up at 6:30 every morning so that I can get to school on time.