这是一道很有讲究的试题，B和C选项确实令人迷惑，归根在于语法知识不牢固。首先，分析句子成份，划清主干 XX at home without anyone taking care of him is certainly unadvisable. 1. taking care of him 是做anyone 的后置定语2。XX is certainly unadvisable，这才是主 展开
这是一道很有讲究的试题，B和C选项确实令人迷惑，归根在于语法知识不牢固。首先，分析句子成份，划清主干 XX at home without anyone taking care of him is certainly unadvisable. 1. taking care of him 是做anyone 的后置定语2。XX is certainly unadvisable，这才是主句3。分析可知xx是主语部分，又因为a child 留在家中是被动的，因 此排除A，D.4。明确a child 是主语，其后未后置定语，只能用不定式 to be left ，不用动名词5。区分名词作状的结构（你为什么选错？） Being left at home,the child felt unhappy. 注意理解其中的不同 收起
