If you are not too tired, let's go out for a walk. if 引导的条件句有真实条件句和非真实条件句两种:
真实条件句，如：If it rains tomorrow, we won’t go on a picnic.
非真实条件句是虚拟语气的一种，表示与事实相反，如：If I were you, I would go with him. so/as long as只要 由as (so) long as, in case引导。
So long as you’re happy, it doesn’t matter what you do.只要你高兴，你做什么都没有关系。 You may borrow my book as long as you keep it clean.只要你保持书的清洁，你就可以把我的书借去。
Take your umbrella in case it rains.带着你的伞吧，以防下雨。
10. (a) few + 可数名词, (a) little + 不可数名词
a few / a little 为肯定含义，还有一点 few / little 为否定含义，没有多少了。 He has a few friends. 他有几个朋友。 He has few friends. 他几乎没有朋友。 We still have a little time. 我们还有点时间。 There is little time left.几乎没剩下什么时间了。 Although he 's wealthy，he spends___ on clothes. A. little B. few C. a little D. a few
答案： A. spend所指的是钱，不可数，只能用little或 a little. 本句为although引导的让步状语从句，由句意知后句为否定含义，因此应用little表示几乎不。
固定搭配:
only a few (=few) not a few (=many) quite a few (=many) many a (=many)
Many books were sold.
Many a book was sold. 卖出了许多书。
七年级英语重点句型总结
1．I think?意为“我认为??”，是对某人或某事的看法或态度的一种句型。其否定式常用I don’t think?，如：I think he’s Mr Zhinag. (L17)I don’t think you are right.
2．give sth. to sb./ give sb. sth. 意为“把??给??”，动词give之后可接双宾语，可用这两种句型；若指物的宾语是人称代词时，则只能用give it/ them to sb. 如：
His parents give him a nice purse./His parents give a nice purse to him. Give it to Mr Hu.(L57) 3．take sb./ sth. to?意为“把??(送)带到??”，后常接地点，也可接人。如： Please take the new books to the classroom.
4．One?, the other?/One is?and one is?意为“一个是??；另一个是??”，必须是两者中。如：One is red and one is grey.(L50)或 One is red,, the other is grey.
5．Let sb. do sth. 意为“让某人做某事”，人后应用不带to的动词不定式，其否定式为Don’t let sb，do sth.，或L