whether
conjunction OPAL W
  /ˈweðə(r)/
  /ˈweðər/
- used to express a doubt or choice between two possibilities(表示迟疑或两个可能性之间的选择)是否 - He seemed undecided whether to go or stay.他似乎还没有决定去留。 
- It remains to be seen whether or not this idea can be put into practice.这一想法能否付诸实践还有待于观察。 
- I asked him whether he had done it all himself or whether someone had helped him.我问过他这都是他自己做的还是有人帮他做的。 
- I'll see whether she's at home (= or not at home).我来看看她在不在家。 
- It's doubtful whether there'll be any seats left.看来未必还有座位。 
 Homophones weather | whetherweather whether/ˈweðə(r)//ˈweðər/- weather noun- Next day the weather turned cold.第二天天气就变冷了。 
 
- Next day the weather turned cold.
- weather verb- Be prepared to weather a storm of criticism.做好经受批评风暴的准备。 
 
- Be prepared to weather a storm of criticism.
- whether conjunction- You'll have wonderful views whether you travel by sea or by air.无论你是乘船还是乘飞机旅行,你都会看到美丽的风景。 
 
- You'll have wonderful views whether you travel by sea or by air.
 Grammar Point if / whetherif / whetherTopics Preferences and decisionsb1- Both if and whether are used in reporting questions which expect ‘yes’ or ‘no’ as the answer: if 和 whether 均用于要求以 yes 或 no 作答的转述疑问句中: 她问我要不要喝点什么。 我们不知道是写信好还是打电话好。 
 
- He seemed undecided whether to go or stay.
- used to show that something is true in either of two cases(表示两种情况都真实)是…(还是),或者…(或者),不管…(还是) - You are entitled to a free gift whether you accept our offer of insurance or not.无论你接不接受我们的保险提议,你都可以免费得到一份礼物。 
- I'm going whether you like it or not.不管你愿意不愿意,我都要走了。 
- Whether or not we're successful, we can be sure that we did our best.不管成功与否,我们确已尽了最大努力。 
 
- You are entitled to a free gift whether you accept our offer of insurance or not.
词源Old English hwæther, hwether, of Germanic origin; related to German weder ‘neither’.