只能说quite sure ,为什么不能说very sure?

只能说quite sure ,为什么不能说very sure? be quite sure that能用吗?老师说只能用be sure that. sure 美国人经常说, 美国人说Sure是什么意思 名词性从句中sure的用法中说其用于肯定句中,但尽然有Are you sure that...为什么用that. sure we will是一种句型还是固定用法?能不能说sure she is之类的? be quite sure that有吗 they were also quite sure that I know he is quite sure ___it.单选答案为什么是C Swimming is very interesting.为什么不能说swim 为什么只能说will be more pollution而不能说will have more pollution 为什么不能说My hometown has changed a lot.只能说Great changes have ta