Though it was raining , he went there .
He didn\'t do this work well though he did his best . 虽然他尽了最大努力，但还是没干好这工作。
※ though 常与 even 连用，表示强调。如：
Even though I didn\'t understand a word , I kept smiling .
2 . 由 after 引导的时间状语从句的句型
But after we left the mountains behind us , there was hardly a cloud in the sky . 然而当我们把群山峻岭甩在后面后，天空几乎万里万云。
※ after we left the mountains behind us，是由连词 after 引导的时间状语从句。引导时间状语从句的还可由 when , while , before , till , since 等词引起。
leave behind 是“把 ( 某物 ) 留在 ( 某物 ) 的后面”。
由 after 引导的时间状语从句举例如下：
After we had finished lunch , we all sat on the grass .
※ after 引导的从句，有时放在主句之后。如：
I arrived at the station after the train had left .
3 . They say that… = It is said that … 据说
…and they say that there are ten sheep for every person . 据说每人占有十头羊。
句中的 they 并没有具体的对象，泛指人们 ( people ) 。
They say that… = People say that… = It is said that… 如：
It is said that he will leave in a few days . 据说他过几天就要动身。
4 . How often do you write ? 你们隔多久通一次信 ?
( 1 ) How often 常用来询问动作的频率，回答可用：some times／very often／not too often／once／twice／three times a year…有时／经常／一年一次 ( 二次／三次 ) 等。例如：
—How often do you go to see your grandmother in the countryside ? 你多久去看一次住在农村的祖母 ?
—Twice a year . 一年去两次。
( 2 ) 注意下面以 how 提问的句子的准确含意。
—How long have you waited here ?
— For about two hours .
how long 表示动作或状态“延续的时间”。
—How much time did you spend on this work ?
— Just a week .
how much time 表示一个“总的时间量”。
5 . …because neither of us has much time . ……因为我们俩没有太多的时间。
neither 意为：两者中任意一个“都不”。所以句中的相关动词或名词应该用单数形式。此句中用 has , 不能用 have。句中的 neither 是代词。例如：
Neither answer is right . 两个答案都不对。 ( 两者中，无论哪个答案都不对。 )
句中的 neither 是形容词，名词 answer 及动词 be 都用单数形式。
Neither of them knows her . 他们俩都不认识她。
6 . Both John and Ann have got penfriends . 约翰和安 ( 两人 ) 都有笔友。
( 1 ) both…and…“对方都；又……又……”，构成关联连词。例如：
She is both beautiful and kind . 她又漂亮又亲切。
She can both sing and dance . 她能歌善舞。
( 2 ) both 在句中还常作形容词和代词。例如：
Both brothers are in Japan . ( both 是形容词 )
Both of the brothers are in Japan . ( both 是代词 )
I saw them both yesterday .
They both went out .
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