has been used to detect gold,这是什么时态?句中的used to 是表示过去常常做某事吗?A new machine called 'The Revealer' has been invented and it has been used to detect gold which has been buried in the ground.这句中的it has been u

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has been used to detect gold,这是什么时态?句中的used to 是表示过去常常做某事吗?A new machine called 'The Revealer' has been invented and it has been used to detect gold which has been buried in the ground.这句中的it has been u

has been used to detect gold,这是什么时态?句中的used to 是表示过去常常做某事吗?A new machine called 'The Revealer' has been invented and it has been used to detect gold which has been buried in the ground.这句中的it has been u
has been used to detect gold,这是什么时态?句中的used to 是表示过去常常做某事吗?
A new machine called 'The Revealer' has been invented and it has been used to detect gold which has been buried in the ground.这句中的it has been used to detect gold是什么时态?used to 是表示过去常常做某事的意思吗?has been buried in the ground这句是现在现成时的被动态吗?请详解.

has been used to detect gold,这是什么时态?句中的used to 是表示过去常常做某事吗?A new machine called 'The Revealer' has been invented and it has been used to detect gold which has been buried in the ground.这句中的it has been u
两者都是现在完成时.has been used to是be used to的现在完成时形式,是“从发明以来一直被用来勘探金矿”的意思,而同样的has been buried in the ground是be buried in the ground的现在完成时形式,就是说“金矿一直被埋在地下”.可以看出两者都是被动语态的现在完成时形式,用法为sth./sb.+has/have+been+done(动词过去分词).现在明白了吗?

has been invented and it has been used to detect gold which has been如果按照你的建议，改为过去完成时，主句从句中的这两种时态，跨度就太大了

这是新概念第二册中的一课。
1/ has been used to detect gold，... 是被动语态+现在完成时态；
2/ used to 应当同前面的 has been 联系在一起看，在这里是指 “被用于做......” 用途。
3/ ... has been buried in the ground 你说的对的，是现在现成时的被动态。

选择：Every possible means ( ) to prevent the air pollutionis used?are used?has been used?have been used? the house where i used to live has been knocked mr green has been used to jogging_________ ( day) 一道新概念二选择题Roy Trenton_____________a bus.A.has been used to drive B.has been used to driving C.has used to drive D.has used to driving My grandpa in Shanghai though he in the northMy grandpa in Shanghai though he in the northA.has been used to the life,used to liveB.has been used to live,used to livingC.has used to live,used to liveD.has been to living,used to the life He has been used to walking to school为什么 to 后面可以跟ing形式? Amy ___ the library.She______ book there times a week.A has gone to； has been used to borrowingB has gone to; is used to borrowing has been used和has used有什么区别, John _____ up early since his childhood.A.is used to get B.has been used to get C.used to get D.has been used to gettingWhy Where is the mistake in he has been used to the life in the countryside.为什么be used to 后加名词 John has been sick for a long time,so he __pain.A.used to B.is used to has been used,has been using的区别 1)Sally has been in China for 10 years ,so she ____(has got used to ,has used to )the Chinese food. 一个关于used to do、be used to doing等意思及用法的选择题He ( ) in the south.Now he has been ( ) in the south.A.used to live;used to the lifeB.used to living;used to live C.used to the life;used to livingD.used to life;used to live Peter has been sick for a long time,so he_ painA.got used to B.became used to C.is used to我觉得三个都可以啊, The house__I used to live has been knocked down.用which 还是in which He has been used to ------- here A.stay B.be C.live D.living He_up early since his childhood.D.has been used to getting为何选D