The boy is old enough to take care of hims

首先画好句子成分
she is not quite herself today.这句话是简单的主系表句子 she是主语 is是系动词 quite herself是表语
所以反身代词很自然做的是表语
而The boy is old enough to take care of himself .前半句是主系表句式 the boy是主语 is系动词 old enough是表语 后面接了个表目的的动宾短语 take care of是动词短语,照顾的意思 himself则做的是动词短语的宾语 另外of是介词 所以himself是介宾
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