dogs are difficlt to take care of中的不定式做句子的什么成分?

dogs are difficlt to take care of中的不定式做句子的什么成分? Dogs are easy to take care of.动词不定式什么成分 Dogs are easy to take care of.句在中的不定式怎么用的. I have parents to take care of.这里的不定式是充当什么成分,做什么用?我的理解是充当形容词 Dogs are too difficult to take care of. Dogs are easy to take care of.改为同意句 我们课本上是Dogs are difficult to take care of.问：take care of 可不可以 关于Dogs are too difficult to take care of 这句话的疑问 dogs are easy to take care （of）.有没有of Dogs are easy to take care of.Food is run out .为什么第二句没有of. 关于英语方面的题句型转换.1.Dogs are too difficult to take care of.（用 eno Dogs are too difficult to take care of中是too……to用法吗?