He held a book of poems as if it were a diamond necklace.虚拟语气后面为啥用的是were不是was?

He held a book of poems as if it were a diamond necklace.虚拟语气后面为啥用的是were不是was? 请问一下句子括号部分用过去时与过去完成时有什么区别?翻译时有什么不同呢?To my surprise,he held up a book,The Collected Works of Edgar Allen Poe,and asked if anyone 【read 】it.To my surprise,he held up a book,The Col 英语：He demanded that the recording of a quiz programme ( ) next week1.would be held 2.will be held 3.be held 4.hold为什么不是1 He held up a piece of paper folded into fourthsfourth加复数是什么意思 (3/4)which he would do.He held up one of his finger and dipped it into a He is really great!Not everyone has such c____ to make the dcisionEvery day he takes the same p____ to scholl.We held an English evening last week and it was a great s_____.This book is the r___ of 25 years of study. he held up a glass of water and asked the class,how heavy do you think this glass of water? 翻译下这句急!He held a map of the world and asked us where we would like to travel He's written a book,the name of which I've forgotten.为什么用of which (2/4) he would do.He held up one of his finger and dipped it into a cup with a mixture.Then he t...(2/4) he would do.He held up one of his finger and dipped it into a cup with a mixture.Then he took it out the cup and put a finger in his mouth and su One day a famous speaker gave a speech to a crowd of people.He held up a 21 bill.He asked,WhOne day a famous speaker gave a speech to a crowd of people.He held up a 21 bill..What 26 I do this He asked,and he 27 it on the ground,and started to ste He lent me a book He is reading a book. one of the men present held the view that what the book said was right. 1.He will open a book store_____ there are a lot of university students. He wrote a book(.)keeping fit.A.for B.on C.of D.with A position he held for 42 yearsa position he held for 42 years能否等于 a position(where/which/that) he held for 42 years He is the a_______ of this book