一般现在时和现在完成时的标志都有never,那么怎样区分这两种时态

求大家 相助 啊~~~~~~

很简单。用在现在完成时里面时，never表达从过去到现在的一次性动作，如 I have never been to Japan..又如，They have never seen such a thing before. 又如，Tom has never swum in a river.用在一般现在时里时，never表达的是主语不会，不情愿去做某事。如，John never comes on foot from so far away. 又如，I never travel in a foreign country.又如，Mary never swims with boys,and she has never swum with them,even once.
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不标志任何时态，什么时态都能用。 he's never been to australia.（完成时）他从来没去过澳大利亚。 i'm never going back there again, not as long as i live.（将来时）我再也不回去了 it is never too late to give up smoking.（一般现在时）戒烟永远都不晚。 i never knew you played the guitar!（过去时）我从来都不知道你弹吉他