8,I think it a pure waste of time playing cards on the Internet
我认为在网上打牌纯粹是浪费时间。
这是一个复合句。
I think 之后是一个宾语从句。
playing cards on the Internet 是从句的真正主语。it 是从句的形式主语。我认为在网上打牌纯粹是在浪费时间你好!我认为在网上打牌纯粹是浪费时间.
I thing it a pure waste of time.it为宾语,后面的名词短语作宾语补足语.
playing分词短语表示补充说明作用.
可以这样理解: I think that playing cards on the internet is a pure waste of time.打字不易,采纳哦!