Unit 9   When was it invented?

(2)was invented 是被動語態.
(3)invent 做動詞,意為 “發明,創造”,其名詞有兩種形式:一種為inventor “發明者”;一種為 invention “發明,創造”
例如:edison was a great inventor, he invented more than 1,000 inventions in his life.
2.it’s used for scooping really cold ice cream.它是用來舀十分冰冷的冰淇淋的.
句型be used for 意為  “被用來做……”,介詞for表示用途,后接名詞或動名詞.如:
(1) sweater is used for keeping warm.毛衣是用來保暖的.
(2) the knife is used for cutting.小刀是用來切削東西的.
3.the custom said they weren’t salty enough.這個顧客說菜不夠咸.
(1)said 后是賓語從句,省略了that.當賓語從句主句用一般過去時,從句也要用過去的某種時態.如:
he asked me whom i was waiting for. 他問我在等誰.
(2)enough修飾形容詞或副詞時應后置.如:
the little child was not old enough to go to school.這個小孩太小了,不能去上學.
但enough 修飾名詞時,可以放在名詞之前,也可以放在名詞之后.如:
i have enough money to buy it.( i have money enough to buy it.)
4.the potato chips were invented by mistake.由于錯誤,薯片被發明了.
mistake 做名詞,意為 “弄錯,誤解”如:
you have made a foolish mistake.你犯了一個愚蠢的錯誤.
mistake 作動詞,意為 “弄錯,誤解”如:
she didn’t speak very clearly so i mistook what she said.她講的不清楚,所以我誤解了她的話.
by mistake 意為 “錯誤地,弄錯地”.
i took his backpack by mistake. 我錯拿了他的書包.
he put salt in her cup of tea by mistake.他錯把鹽放進她的茶里.
5.although tea wasn’t brought to the western world until 1610, this beverage was discovered over three thousand years before that.雖然,茶直到16XX年才傳入西方世界,但是這種飲料在三千多年前就被發現了.
(1)although 作連詞,意為 “雖然,盡管”,引導讓步狀語從句,我們不能根據漢語習慣.在后面使用連詞but,不過它可以與yet, still連用;若主從句的主語相同,且從句謂語含有動詞be,可將從句主語和動詞be省略.如:
although (it was)snowing, it was not very cold.
雖然在下雪,但是天氣不是很冷.
there is air around us, although we can’t see it.
盡管我們看不見,但是我們周圍全是空氣.
although (he is) quite young, he knows a lot.
雖然他很年輕,但是他很懂事.
(3) not…until 意為 “直到……才”until 引導一個時間狀語從句.如
he didn’t go to bed until his father came home.直到他爸爸回家時他才睡覺.
6.according to an ancient chinese legend, the emperor shen nung discovered tea when he was boiling drinking water over an open air.
根據中國古代的一個傳說, 神農帝在戶外的火上燒飲用水時發現了茶葉.
(1) according to 是個短語介詞,意為 “根據……;依照……”后接代詞,名詞或由疑問詞以及whether引出的名詞性從句.如:
according to the radio, it will rain tomorrow.根據收音機說,明天有雨.
according to what you said just now, he was right then.