高中英语中常用it固定句型结构

精品文档 1欢迎下载 1 高中英语中常用 it 固定句型结构 1 It was will be long 时间 one week two years before 从句 译为 很久 一周 两年后 才 如 It will be long before he is back 很久以后他才回来 2 It is has been was some time since 从句 译为 自从 以来已经有多 长时间了 如 It has been three days since he was ill 他生病已经有三天了 注意 如果 since 从句中的谓语动词为延续性动词时 应译为 自从不 以来已经 有多长时间了 如 It is has been seven years since I taught in this school 我离开这所学校已经有七年了 时态的把握 如果主句运用的是一般现在时或现在完成时 那么 since 引导的从句用 一般过去时 如果主句运用的是一般过去时 那么 since 引导的从句常用过去完成时 3 It be the 序数词 time that 从句 译为 是某人第几次做某事了 如 It is the first time that I have come here 这是我第一次来这儿 注意 如果主句是一般现在时或一般将来时 从句用现在完成时 如果主句是一般过去 时 从句用过去完成时 4 It be 具体时间 when 译为 当某事发生时 时间是在 如 It was 10 00 when they arrived at the factory 他们到达工厂时是十点 5 It is high time that sb did sth 该句型表示 某人现在该做某事了 从 句常用过去时 虚拟语气 如 It is high time that you got up 6 It is adj for sb sth to do sth 常用的形容词有 easy hard difficult possible important impossible necessary good bad exciting interesting surprising 等 如 It is necessary to change your job 精品文档 2欢迎下载 2 7 It is n for sb sth to do sth 常用的名词有 pity shame pleasure one s duty one s job fun joy good manners bad manners 等 如 It is a pity for you to have missed such a wonderful play It is good manners for the young to take up the seats for the old 8 It is adj of sb to do sth 此句型中的形容词主要描述某人的品德 特征 能用于该句型的形容词有 kind nice wise silly polite impolite friendly foolish clever 等 如 How silly it was of you to give up such a good chance 9 It is adj n doing sth 此句型中的形容词和名词常见的有 no little use no much good useless 等 如 It s no use crying over spilt milk 10 It takes took sb 一段时间 to do sth 表示 做某事花费某人多长时 间 如 It took us half an hour to ride to the town 11 It is 及物动词的过去分词 that 从句 此句型中常见的及物动词的过去分词有 said told known reported recorded thought believed considered 等 如 It is reported that the Russian President will visit China next week 12 It 不及物动词 that 从句 此句型中不及物动词常见的有 seem happen appear matter 等 如 It seems that there will be a heavy snow tomorrow 精品文档 3欢迎下载 3 It happened that I met my good friends in the museum yesterday 13 强调句型 It is 被强调部分 that who 从句 在使用强调句型时要注意 指人时可以用 who 或 that 其它情况一律用 that 如 It was under the bed that my brother hid the ball this morning 14 make it 表示 成功 做到 赶上 如 The train is due to leave in five minutes we will never make it 火车再有五分钟就开了 我们是绝对赶不上了 15 see to it that 注意 留神 负责 See to