as if与if的区别 语法上,
as if与if的区别 在于意思不同;语法上可以引导不同的从句。
1. as if :好像;似乎;仿佛。
引导方式状语从句、表语从句。从句可以是虚拟语气,也可以不用虚拟语气。
例如:
Anne shrugged, as if she didn't know.
安妮耸了耸肩,好像她不知道。
I felt as if my heart had stopped. (表语从句、虚拟语气)
我觉得好像我的心都不跳了。
I can remember our wedding as if it were yesterday. (方式状语从句、虚拟语气)
我们的婚礼我记忆犹新,就像昨天一样。
He looked as if he was going to smile. (引导表语从句)
他看上去好像要微笑。
2. if;conj.(表条件)如果;
(表假设)要是,假如;无论何时;虽然,即使;
可以引导条件状语从句、宾语从句。从句可以使用虚拟语气,也可以使用不虚拟语气。
例如:
If you're in trouble, I'll help you. (条件状语从句)
如果你有困难,我会帮你。
If only I had gone by taxi. (虚拟语气)
我要是乘出租车去就好了。
She asked if I would help. (宾语从句)
她问我是否会帮忙