Don't you think it is adj 与Don't you think it adj的区别.比如：Don't you think it _____ to play against the green team?里面是填 is challenging 还是 challenging?说下原因.

Don't you think it is adj 与Don't you think it adj的区别.比如：Don't you think it _____ to play against the green team?里面是填 is challenging 还是 challenging?说下原因.
Don't you think it is adj 与Don't you think it adj的区别.
比如：Don't you think it _____ to play against the green team?
里面是填 is challenging 还是 challenging?说下原因.

Don't you think it is adj 与Don't you think it adj的区别.比如：Don't you think it _____ to play against the green team?里面是填 is challenging 还是 challenging?说下原因.
Don't you think it is challenging to play against the green team?
这是宾语从句
challenging是现在分词作补语.
都可以用,意思一样

填 is challenging 。
challenging 在这里是形容词，富有挑战性的。It 是形式主语，真正的主语是to play against the green team ，is 是谓语动词，后面加形容词，且不可省略，否则句子不完整。