求大神帮我看看其中的错误 英语

题目

求大神帮我看看其中的错误 英语
噢 今天写作文 the advantages and disadvantages of the Internet
我写了一句 playing computer games online is not only bad for our eyes but also will waste a lot of time
怎么订正?
我用百度翻译翻译的那句话呀.
应该是语法错了

答案

你所写的：playing computer games online is not only bad for our eyes but also will waste a lot of time
is要适合not only后面的词,也要适合but also后面的词.
is bad for..没错,但是is will waste...就不对了
所以可以把waste a lot of time改成一个名词：a waste of time
is a waste of time就没有语法错误了