the number of …的数目,后跟名词复数,动词用三单, a number of =many,大量,许多后跟名词复数,动词用复数形式。a large number of, a small number of , invite sb.to do sth. 邀请某人做某事 find+ it+ adj+to do sth.发现做某事怎么样 try to do sth.尽力做事 try d...
at the age of / when sb. was…years old 在…岁时 at last / in the end / finally 最后、终于 at the beginning of the twenty-first century 在21世纪初 at the end of 在…终点,结尾 at the moment /now现在 at the foot of 在…脚下 at Christmas 在圣诞节 at a...
The boy’s father told the boy that water freezes when the temperature drops below zero. 2. 从句中有具体时间状语,即使从句动作发生在主句动作前,仍然用一般过去时。 The teacher...
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