理想气体911
have has having had患 这个词很多 catch catches catching caughtrain rains raining rainedsee see seeing sawlook looks looking lookedbuy buys buying boughtcook cooks cooking cookedstop stops stopping stopped

刘阳780210
第一个:He went to the United States.第二个:He has gone to the United States.第三个:He is going to the United States. (也可以说He will going to the United States)be going to的意思是 打算(还未决定),will的意思是 将(已经决定),根据需要选用不同的句子区别,我分开来说吧:先说have gone to,have been to1) have gone to意为“到某地去”,说话时该人不在现场,一般不用第一人称、第二人称代词作句子的主语。如:—Where is Jim?———吉姆在哪里?—He has gone to England.———他去英国了。(尚未回来)Mr Wang isn't here.He has gone to Qingdao.王先生不在这里。他去青岛了。2) have been to意为“曾经去过某地”,现在已不在那里了,现在回来了,后可接次数,如once,twice,three times等,表示“去过某地几次”,也可和 just,never,ever等连用。如:My father has been to Beijing twice.我父亲去过北京两次。I have never been to the Great Wall.我从未去过长城。3) have been in表示“在某地呆了多少时间”,常与时间段状语连用。如:I have been in Shanghai for three years.我到上海已有三年了。He has been in London for half a month.他来伦敦已有半个月了。再来说went to,go to,be going towent to就是go to的过去时,常用于一般过去式的句子中,go to是一般现在时,be going to是将来时态的。而have been to ,have gone to这两个是完成时的如果还没有分清楚过去时,现在时,将来时,完成时,那就自己去查吧!望采纳,可以吗?打字打得好可怜
cindydaniel
以前去过,现在回来了:He has been to USA在美国呆着,不在说话现场:He has gone to USA他马上去美国:He is going to USA soon如果是 He went to USA, 一般后面要跟时间,表示什么时候去的,比如 he went to USA yesterday或者He went to USA two year ago(他两年前去的美国)=He has gone to USA for 2 years(他已经在美国待了两年了,不过一般表示待多久的话会用stay而不用go,不过这边为了表现时态的区别,所以先用一下)He goes to USA frequently 他时常去美国,这里的一般现在时表示一直发生
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