lf是什么意思

if的音标发音

英 [ɪf] 美 [ɪf]

if的语法说明

1、if whetherBoth if and whether are used in reporting questions which expect ‘yes’ or ‘no’ as the answer。(翻译：if和whether均用于要求以yes或no作答的转述疑问句中)

2、When a choice is offered between alternatives if or whether can be used. (翻译：当提供选择的时候，用if或whether都是可以的)

3、In this last type of sentence, whether is usually considered more formal and more suitable for written English. (翻译：在最后这一句型中，一般认为whether较正式，更适用于书面英语。)

if的双语例句

1、If there was any disappointment it was probably temporary 即便有点儿失望，也肯定是暂时的。

2、A number of recent advances hold out if not the hope of a cure, then at least the possibility of some drug which could stop the spread of the virus 近来的一些进展即使不能提供治愈的希望，也至少有望研制出来某种药物来阻止病毒的传播。

3、I became a distraught, worried mother, a useless role if ever there was one 我变成了一个忧心如焚的母亲，一个全无用处的角色。

4、Sometimes, that standard is quite difficult, if not impossible, to achieve 有时即便有可能达到那个标准，那也是非常困难。

5、I wonder if you'd be kind enough to give us some information, please? 请问您能不能给我们提供一些信息?

6、Living together didn't harm our friendship. If anything it strengthened it 在一起住并没有损害我们的友谊。要说真有什么的话，它反而巩固了我们的友谊。

（责任编辑：张欣茹）