Question

18．我认为父母没有必要阻止孩子参加不同的社团．
I don't think it's necessary for parents to stop their children from joining different clubs．

Answer 1

分析 I don't think it's necessary for parents to stop their children from joining．

解答 答案：I don't think it's necessary for parents to stop their children from joining．这里是所客观事实用一般现在时，我们需要用宾语从句来表达，主句是我认为I think，余下的作为think的宾语从句，父母没有必要阻止孩子参加不同的社团是否定句，此时需要将否定转移到主句上，故主句是I don't think，表示对某人来说做某事是怎么样的用It's+adj+for sb．to do sth．这里必要的necessary，父母parents，阻止某人做某事stop sb from doing sth，他们的孩子their children，加入社团用join，故答案是I don't think it's necessary for parents to stop their children from joining．

点评 动词think，believe，suppose，imagine，expect，feel的主语是第一人称、谓语动词为没有任何副词修饰的一般现在时，它们的否定式实际上是对宾语从句或复合符合宾语或状语的否定．表示说话者提出一种委婉的看法或主张，即将not从宾语从句的谓语动词的前面，转移到了主句谓语动词think，believe，suppose等的前面．即（否定前移） 
e．g．：I'm sorry，but I don't think I know you．对不起，我想我并不认识你．（否定宾语从句）   
I don't find the story interesting．我认为这个故事没有趣．（否定复合宾语）