weather与if的用法区别

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weather与if的用法区别
weather与if的用法区别

weather与if的用法区别
应该是whether和if的用法区别吧?因为这两个都是是否的意思.
1.whether ['hweðə]
conj.
1.是否:
to ask whether she will help
问她是否能帮帮忙
2.不管…还是…:
Whether he drives or (whether he) flies,he'll be on time.
不管他坐车来还是坐飞机来,他都将准时到达.
3.(两者中的)任何一个:
taxation to support the war,whether just or not
支持正义或非正义战争的赋税
pron.
[古语](两者中的)哪一个;(两者中的)任何一个
adj.
[古语](两者中的)哪一个;(两者中的)任何一个
2.if
if [if]
conj.
1.[表示条件或假设]如果;假如,倘若,要是:
If I knew,I would say.
如果我知道,我就说了.
If I were you,I would have failed.
如果我是你,我可能会失败的.
2.尽管;虽然;即使:
If he is little,he is strong.
他尽管年纪小,力气倒蛮大的.
If I am wrong,you are not right.
即使我错了,你也不对.
3.是否:
I don't know if he is at home.
问他是否在家.
Ask him if he's at home.
我不知道他是否在家.
4.当…时,就:
If I do not understand,I ask questions.
当我不懂时我就问.
If I feel any doubt,I ask.
我有疑问时就问.
5.[表示愿望、感叹]要是…多好:
If I hadn't lost my purse!
我的钱包要是没丢多好!
6.[与 will,could 等连用,表示婉言请求]:
If you will keep waiting for a while,they'll soon be back.
请你再等一会儿,他们很快就会回来了.
7.[与动词否定式连用,表示惊讶、愤怒等]:
If isn't Stephen!
那不是史蒂芬吗!
n.
1.疑问;设想;有疑问的事
2.条件,必需的条件;规定