其实语言没有必要这么语法话的...和说中文一样,当你说:学习英语是很重要的...说明你的语态很肯定,言下之意对所有人来说都是很重要的...而当你说:我认为学英语是很重要的. 此时你是在强调你的个人观念并有引导别人也去认为学习英语是很重要的...所以 I think sth...的句式确切地说是引诱性的建议句式...比如: I think this shirt is better than that one ; I think you should go with me; I think it is nice..
