八年級英語下冊Unit 8知識講解
i can give you some help. do you need it? 我可以幫助你，你需要嗎？（代詞）
i need to go right now 你需要現在就走。（不定式）
need表示“必須”，還可作情態動詞，沒有人稱、數和時態的變化，接動詞原形作謂語，直接加not構成否定形式。只用在否定句和疑問句中。
例如：
i needn’t finish that work today. 我今天不必把那項工作做完。
need you go right now? 你一定得現在走嗎？
(2)too much意為“太多”，用于修飾不可數名詞。
there is too much time left. 還剩下太多的時間。
8. later，the same gift may be given away to someone else.
后來，同樣的禮品可能被贈送給別人。
該句為含有情態動詞的被動語態。give away表示“贈送，捐贈”是固定的短語動詞。
例如：
he has decided to give all his money away to charity. 他已決定把所有的錢都捐贈給慈善機構。
i've given the books away to a library. 我已經把那些書捐贈給一家圖書館。
her little boy had cried so heavily when they had given the dog away.
他們把狗送給別人時，她的小兒子哭得很厲害。
they are giving away free toys when you spend more than $30 in the store.
如果你在那家商店消費超過30美元，他們免費贈送玩具。
9. twenty-four singers from across china recently competed by singing a number of popular english songs.來自全中國的24名歌手最近通過唱若干首流行英語歌曲來比賽。
(1)句中“by+動名詞”表示“通過某種方式或手段”，在句中作方式狀語。
i did not think she would do any good by coming over. 我認為她過來不會有什么好處。
there is nothing to gain by waiting. 等待將一無所獲。
he taught himself to play the violin by practising all night.
通過整夜練習他自學拉小提琴。
(2)a number of表示“許多，大量，若干”是量詞詞組，其后只跟可數名詞。
the parents were invited to see the program，and a number“people came，too.
父母應邀來看節目，不少人也來了。
there were a number of people out this afternoon. 今天下午許多人出去了。
a number of accidents always occur on such days. 在這種日子里常常有事故發生。
10. if there were new words in a song，i looked them up in the dictionary.
如果在歌曲里有生詞，我就查字典。
這是一個含有條件狀語從句的主從復合句。主句中look up表示“(在詞典、書籍中)查找”。
按照英語習慣用法，“查字典”為look up the words in the dictionary，不說look up the dictionary。另外，look up是“動副”結構的及物的短語動詞，名詞作賓語置于副詞前后皆可，代詞作賓語要置于副詞之前。
if you don't know the meaning of a word，look it up in a good dictionary.