2.I think English is easier than Math.
3.My hair is longer than my sister's
4.I am more friendly than Jim.
5.My apple is bigger than yours.
6.I am busier than my sister.
楼主下面写出来的那个句子是错的.那应该如何改正？下面那个句子？改成I think playing tennis is harder than playing soccer就行了。或者I think tennis is more difficult than soccer to play