I'm not that sure when she'll be back.是什么从句?帮我理解下 这句话用了什么语法,

I'm not sure I'm not so sure about that...的中文翻译 This sure is light,because I'm not that strong! I'm not sure 快 I'm not sure yet. I'm not sure()( 至今) I'm not sure that's a good idea中that's 为什么带s I'm sure I am not wrong I'm just not sure that's the right move right now.翻译,right There is ____ that he may come ,but I'm not sure .(possible) i'm not sure ______ he is speaking at the meetingA that B who Cwhether Dwhat 用must,can't改句子I'm sure that he is a middle school teacher.I'm sure that she is not playing the piano. 有没有I’m not too sure? NOW, I'm not sure 什么意思 为什么没有I’m not too sure? I'm not sure of that ,And I think he is probably at home .此句中的that I'm sorry.I'm late today._______ be late next time.A.Be sure to notB.Be sure that you notC.Be sure not toD.Be sure that you didn't I'm not sure when I should go.同义句 I'm not sure when( )( ).