关于英语非谓语的问题These books must be returned to the library after

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关于英语非谓语的问题
These books must be returned to the library after being read
谓语动词是return,非谓语动词应该是发生在return之前,为什么是being read 而不是having being read.

没有having being read 这种形式,你想说的应该是having been read 吧,这种用法表示过去发生的动作对现在造成的影响,此句中没有表达这种意思,所以不用
after是介词,后加动名词,read又表示被动,只能用being read

关于英语非谓语的问题These books must be returned to the library after The books▁(belong)to the school library must be returned at This book must ---to the library on time.A,be returned B,giv ____ these books to the library, as they will soon be overdu You must r____ the books to the library tomorrow. You must r___ the books to the library tomorrow. please return these books to the library as soon as----- 英语,关于非谓语问题. i returned the book to the library的同意句 You must r_ all books to the library before Friday. Have you returned the books to library?- A.Yes,I did B.NO,Id 1.His ___(miss) books are usually returned to the library.