though, although 注意： 当有though, although时，后面的从句不能有but，但是 though 和yet可连用 Although it's raining, they are still working in the field.虽然在下雨，但
连接词主要有 if, unless, as/so long as, on condition that 等。.if 引导的条件句有真实条件句和非真实条件句两种。非真实条件句已在虚拟语气中阐述。 unless =
结果状语从句常由so… that 或 such…that引导，掌握这两个句型，首先要了解so 和 such与其后的词的搭配规律。比较：so和 such 其规律由so与such的不同词
表示目的状语的从句可以由that, so that, in order that, lest, for fear that, in case等词引导，例如： You must speak louder so that /in order that you can be heard by all. He wrot
比较：because, since, as和for 1） because语势最强，用来说明人所不知的原因，回答why提出的问题。当原因是显而易见的或已为人们所知，就用as或 since。
方式状语从句通常由as, (just) as…so…, as if, as though引导。 1） as, (just) as…so…引导的方式状语从句通常位于主句后，但在(just) as…so…结构中位于句首
地点状语从句通常由where, wherever 引导。 Where I live there are plenty of trees.我住的地方树很多。Wherever I am I will be thinking of you. 不管我在哪里我都会想到你
19.1 地点状语从句地点状语从句通常由where, wherever 引导。 Where I live there are plenty of trees.我住的地方树很多。Wherever I am I will be thinking of you. 不管我在
1）不用that的情况a) 在引导非限定性定语从句时。 (错) The tree, that is four hundred years old, is very famous here.b) 介词后不能用。 We depend on the land from which we
1）what = the thing which；whatever = anything What you want has been sent here. Whatever you want makes no difference to me. 2) who= the person that whoever= anyone who （错）Who breaks