I think watching English movies is helpful.(改为否定句及反意疑问句）
问题描述：
I think watching English movies is helpful.(改为否定句及反意疑问句）
答
否定句：I don't think watching English movies is helpful.否定转移，即对宾语从句进行否定，否定词放在主句部分）
反义疑问句：I think watching English movies is helpful， isn't it？
或：I don't think watching English movies is helpful，is it？）
答
否定句：I don't think watching English movies is helpful.(注意否定的转移，即对宾语从句进行否定，否定词放在主句部分）
反义疑问句：I think watching English movies is helpful， isn't it？（主语是第一人称的宾语从句的反义疑问句，其疑问部分根据从句里的内容而定。当然得注意否定转移的情况。如：I don't think watching English movies is helpful，is it？）
答
I don't think watching English movies is helpful ,is it?
答
I don't think watching English movies is helpful.
Do I think watching English movies is helpful?