Question

高中英语语法题。

Q1 It rained heavily in the south,(causing) serious flooding in some provinces.为什么用causing?为什么不能用having cause? Q2 The traffic rule says young children under 4 and (weighting) less than 40 pounds must be in safty seat.为什么用weighting?在句子中做什么成分?

Answer 1

1.
-ing
形式作状语，表示结果。如果用
having
caused
则表示该动作发生在
rained
之前，意思明显不对。
2.
weighing
是-ing
形式作定语，修饰
young
children。young
children
under
4
and
(weighting)
less
than
40
pounds
意思是“四岁以下体重低于四十磅的儿童”。