动词的非谓语形式

But the red men were not so infrequent visitors of the English settlements, that one of them would have attracted any notice from Hest Prynne, at such atime; much less would he have excluded all other objects and ideas from her mind.

通常情况下，在非真实条件句中主句和从句的谓语动词所指时间是一致的，但有时也可能指不同的时间，这时要根据上下文的意思采用不同的谓语动词形式。

Had been doing have/has been doing 一般进行完成过去 was/were given was/were being given had been given 现在 am/is/are given am/is/are being given have/has been given /将来 will/shall be given / will/shall have been given /过去将来 should/would be given / should/would have been given

完成进行 2。被动形式/ CET-4 常考的三种时态：过去完成时；将来完成时；完成进行时。时间状语从句当中的时态：一般过去时所有的过去用一般现在时表示现在和将来现在完成时现在完成和将来完成一。非谓语动词一。

Had been doing have/has been doing /一般进行完成过去 was/were given was/were given had been given being 现在 am/is/are given am/is/are being given have/has been given 将来 will/shall be given / will/shall have been given /过去将来 should/would given / should/would have been given be

完成进行 2。被动形式// CET-4 常考的三种时态：过去完成时；将来完成时；完成进行时。时间状语从句当中的时态：一般过去时所有的过去用一般现在时表示现在和将来现在完成时现在完成和将来完成一。非谓语动词一。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。