2012 年高三一轮复习金子般的学案语法部分：it 的用法及强调句型（新人教版）it 的用法一、it 作指示代词【完成句子】 用 one，ones，it，that，those 填空 (1) — I can't find my watch. — You haven't found ______？ If you want to buy a new ______， I suggest you buy ______ made in China. (2) We've got a big cup and two small ______. (3) The weight of an elephant is much greater than ______ of a tiger. (4) The books on the first shelf are easier than ______ on the second shelf. (5) The boy told his story and ______ of the girl upstairs. 【答案】 (1) it; one; one (2) ones (3) that (4) those / the ones (5) that / the one【结论 1】 ① 指代上文提过的事物时，it 指的是同名同物，相当于 the＋名词； ②one 指的是同名异物，表示单数可数名词相当于 a ＋名词；a / an＋形容词＋one 等于a / an＋形容词＋名词；复数形式用 ones； ③that 后面常有后置定语，有特指意义，代替不可数名词或单数可数名词，相当于 the＋名词； ④ 复数名词用 those，相当于 the ones。 【例句观察】 — Someone is knocking at the door. Who is it? — It must be Leo. He said he'd come to see me. 【结论 2】it 指代人时，常指小孩或身份不明的人。【例句观察】 It's too quiet in the room. Everyone just keeps silent. 【结论 2】it 可用以指代环境或情况。【完成例句】 [ ] 根据语境补全句子用心 爱心 专心1 (6)— What time is it now? — It's half past seven. (7)— It is spring now and it's warm these days. 【结论 4】 it 可用以指代时间、季节、天气或距离。【注意】 it 指代时间时，有如下一些句型： (1) It is time for sth. (for sb.)to do sth. / that－从句(should do / did, 必须用虚拟语气) 例： ① It's time for lunch. ② It's time for us to clean the house. ③ It's time that we should clean the house. ＝It's time that we cleaned the house. (2) It is / has been ＋ some time ＋ since－从句 (从句用一般过去...
