A truly great book should be read in youth,again in maturity and once more in old age,as a fine building should be seen by morning light,at noon and by moonlight.

———Robertson Davies

一本真正伟大的书应该在青年时读，然后在成熟后读，最后在老年时还要读。正如一个优美的建筑应该在晨光中看，中午再看，最后在月光中看。

———罗伯逊·戴维斯

as引导让步必须倒装：Much as I sympathize…

even不能连接句子
as long as只要
while从句谓语动词必须持续性
wh-ever与no matter wh-只有在让步状语从句中可以互换；wh-ever可以引导名从
在whether引导的让步状语从句中，从句的谓语动词是be动词，可以省略whether，将be动词原形提到主语之前
eg：Be it or not
despite=in spite of尽管
unless=if…not如果不
as long as=so long as只要
by the time➕过去，前过去完成

➕现在，前将来完成（到…为止）
since既然（强调众所周知的理由）
not…untill 直到…才…（非延续性）
because=in that
since=now that既然；由于（众所周知）
as强调说话人看来很明显的理由
For表原因不能放句首
because of ；due to ；owing to ；thanks to
短语不接句子（由于，因为）
⚠️注意时间状语从句和定语从句的区别

#小情画[超话]#
THE CROW AND THE PITCHER
乌鸦和水罐
A thirsty Crow found a Pitcher with some water in it, but so little was there that, try as she might, she could not reach it with her beak, and it seemed as though she would die of thirst within sight of the remedy. At last she hit upon a clever plan. She began dropping pebbles into the Pitcher, and with each pebble the water rose a little higher until at last it reached the brim, and the knowing bird was enabled to quench her thirst.
Necessity is the mother of invention.
一只口渴的乌鸦发现了一个大水罐，虽然里面没有多少水，但毕竟也能解解渴，于是她想尽办法用自己的长喙去接触水面，然而，尽管救命之水就在跟前，可她却无能为力。最后，她想出一条妙计。乌鸦开始用嘴叼着石子投到水罐里，每丢进去一粒石子，水面就会上升一点。终于，水面上升到了乌鸦的嘴边，她高兴地喝到了水，解了口渴。
需求是发明之母。

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