如果否则英文

1.当if…not…引导非真实条件分句时，一般不可改用unless。 例如：If she had not had an alarm clock,she would have missedthe train.（事实：她有闹钟。）如果把上述例句中的if…not…换成unless，意义就相反了。（误）Unless she had had an alarm clock, she would havemissed the train.（事实：她没有闹钟）2.If…not…引导的条件分句可以重叠使用，unless则不可， 因为unless表示唯一条件。例如：She won't lose weight if she doesn't keep a diet and ifshe does not take exercise every day.3.unless引导的分句可用否定结构，而if…not …引导的分句不可再否定。例如：Don't ask me to explain unless you really don't understand.The directors have a meeting every Friday,unless there is nothing to discuss.以上两例句中的unless不可换成if…not…。

你好!否则otherwise 英[ˈʌðəwaɪz] 美[ˈʌðərwaɪz] adv. 否则; 另外; 别的方式; adj. 别的，另外的; 不同的; conj. 否则，不然; [例句]Make a note of the questions you want to ask. You will invariably forget some of them otherwise把想提的问题记下来，否则总是会漏掉其中的一些。

否则 [词典] otherwise; if not; or else; [例句]申请必须在二十四小时内办理，否则不予受理。The application must be made within twenty-four hours, or it will not be attended to.

if nototherwiseor elseelseelsewise这些都是哦

or elseotherwise