问题: 请解答，With his son _____, the old man felt unhappy.空格填 disappointing不是being disappointed
With his son _____, the old man felt unhappy.
A. to disappoint B. to be disappointed
C. disappointing D. being disappointed
为什么选C不选D
解答:
前半句 with his son disapointing是独立主格结构，动词用现在分词时表示原因。动词为不定式时表示目的或结果。
本句的意思是；儿子令人失望，所以老人不高兴。表示原因所以用现在分词选C或D
with his son disapointing 儿子令人失望，with his son being disapointed 儿子傻失望C是主动D是被动句所以选C。
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