And scores of online discussion boards have popped up on which people discussnegative experiences tied to too much time on the Web.
英語四級譯文:
網(wǎng)上突然出現(xiàn)了很多討論區(qū)，專門討論花太多時間上網(wǎng)的負(fù)面體驗。
四級詞匯講解:
本句的主干是boards have popped up。on which引導(dǎo)的是以online discussion boards為先行詞的定語從句，起補充說明作用，其中過去分詞短語tied to too much time on the Web作negative experiences的后置定語，tied與negative experiences為被動關(guān)系。
pop up的意思是“突然出現(xiàn)，冒出來”。如:
After the rain, mushrooms seem to pop up overnight.
下過雨后，蘑菇似乎一夜之間就冒了出來。
tie...to...的意思是“使緊密結(jié)合”。如:
Our success is tied to you.我們是否成功和你緊密相關(guān)。
四級考點歸納:
過去分詞短語作定語時，通常放在所修飾的詞之后，實際上相當(dāng)于一個定語從句。如:
※ These are problems left over by history.=These are problems thatlwhich axe left over byhistory.這些是歷史遺留下來的問題。
※ I like the idea presented by my dad.=I like the idea that/which is presented by my dad.我喜歡爸爸提出的主意。
※ She is the first nurse trained by their country.=She is the first nurse that/who is trained bytheir country.她是她們國家自己培養(yǎng)的首位護士。
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