3. become—became 变为,变成 4. begin—began 开始 5. buy—bought 买 6. bring—brought 拿来,带来 7. beat—beat 敲打,搅拌 8. blow—blew 吹,吹动 9. break—broke 打破,打碎,折断 10. build—built 建筑,建造 11. can—could 能,会,允许,可以 12. come—came 到,...
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...
4.It is time + 主语+ 过去式(该是……的时候了) 例如: It is time the authorities concerned took proper steps to solve the traffic problems. 该是有关当局采取适当的措施来解决交...
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