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in time 及时

in total 总计;一共

increase by 增加

insist (that) sb. (should) do 坚持要某人做某事(虚拟语气)

insist on doing/sth. 坚持……

insist that… 坚持说、坚持主张

intend for 为……准备

intend to do 打算去做

invite sb. to sp. 邀请……到……

It appears/appeared (to sb.) that… 对某人来说好像……

It is (high) time (that) sb. did/should do 是该做……的时候了(虚拟语气)

It is A not B… 是A不是B(谓语动词与A一致)

It is a pleasure to do… 很高兴做某事

It is believed that… 人们相信……

It is better to do…than to do… (后者)比(前者)好

It is certain that… ……是确定无疑的

It is hoped that… 人们希望……

It is important that… ……重要

It is known that… 人们知道……

It is likely that… ……有可能……(可能性一般)

It is necessary that… ……有必要

It is no use/good doing… 做……没有用

It is no wonder that… ……毫无疑问。/……是确定无疑的。

It is not any use/good doing… 做……没有用

It is one's turn to do sth. 轮到某人做……

It is polite/impolite to do… ……(不)礼貌。

It is possible that… ……有可能……(可能性最小)

It is probable that… ……有可能……(可能性最大)

It is reported that… 据报道……

It is said that… 人们说……

It is suggested that… 人们建议……

It is tempting to conclude that… 我们可以推出结论……

It is thought that… 人们认为……

It is up to sb.(to do) 由某人来决定

It is useless doing… 做……没有用

It is/was+被强调部分+连词+从句 (强调句型)

It is+adj.+of sb. =sb. is adj. 某人怎么样

It is+n.+for sb. to do sth. = To do sth. is n. for sb. 做某事对某人是……

It makes no difference. 没有什么区别。

It occurred to sb. that… 某人忽然意识到……

It seems that… 看起来……

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