二、在否定句中，可以用need的否定形式＋have done。
1．We needn't have worried．其实我们不必要慌。
2．You needn't have mentioned it．你本来不必提起这件事。
3．You needn't have said that when he asked．当他问的时候，你其实不必要说。
三、needn't后的不定式间或也能用进行式或被动语态。
1．He needn't be standing in the rain．他不必要站在雨中。
2．We needn't be waiting in this place．我们不必要在这儿等。
need作为实义动词时的用法是：
人/物＋need+n.
人＋need ＋to do
物＋need ＋doing
物＋need ＋to be done
EX.:
1．We need to collect (collect) the parcel before we leave for England．去英国之前，我们需要收拾好行李。
2．We need to tell (tell) him the truth．我们需要告诉他真相。
3．My car needs repairing / to be repaired (repair)．我的汽车需要修理。
4．The flowers need watering/to be watered(water)．这些花需要浇水。
5．His leather shoes needs to be mended/mending (mend)．他的皮鞋需要修补。
6．Her room needs cleaning/to be cleaned (clean)．她的房间需要打扫。
7．It is a question that needs very careful consideration(consider)．这是一个需要慎重考虑的问题。
8．I need a watch．我需要一块手表
3. otherwise
otherwise 用作连词，意思为“否则；要不然”，相当于 or，or else 或 if not .
We’ll go early, otherwise we may not get a seat.我们得早点去，要不然就没有座位了。
Seize the chance，otherwise you will regret it.抓住机会，要不然你会后悔的。
otherwise 用作副词，具有下列意义：
1. 意为“另外；别样”。相当于 differently 或 in another way .
He evidently thinks otherwise.他显然有不同的想法。
2. 意为“在其他方面”。相当于 in other or different ways.
The rent is high, but otherwise the house is satisfactory.房租是贵，可这房子在别的方面倒令人满意。
He is noisy, but otherwise a nice boy.他爱吵闹，但在其他方面倒是个好孩子。
EX.:
I was ill that day，otherwise I would have taken part in the sports meet.那天我病了，否则我会去参加运动会的。
www.yf1234.com We didn’t know you were in trouble at that time，otherwise we would have given you a hand.我们当时不知道你遇到了困难，要不然我们会帮助你的。
You will have to go now, otherwise you’ll miss the bus.你得马上动身，否则赶不上汽车。
He was tired but otherwise in good health.她就是累，除此之外很健康。
4. make sure 查明;设法确保,确定
make sure of sth.
make sure that
be sure of sth
be sure that
You must make sure of the time and place. 你必须把时间和地点弄清楚。
5. be free of
6. look after
7. take a break休息
=have / take a rest=rest
有关take的短语
Take exercise运动，锻炼
Take off脱下，起飞
Take up占据（时间、空间）
Take pictures照相
Take a seat=have a seat坐下
Take a walk散步
Take away拿走
Take down取下
Take care of＝look after照顾
8. unfortunately adv. 不幸的
高一英语city and country教案