they are not sure why this is happening这个从句是什么从句

他们不能确信是they are not sure还是they can‘t be sure?为什么 we are not sure. are you sure they are they are sure to be are you sure ()they will come为什么天 that ×而不是if ×或whether or not they are not sure why this is happening这个从句是什么从句 They should respect the common space that we share and make sure that they are not making a mess. they sure are 是什么句型来的 --How long are they _______the house?--I am not sure.A.buying B.leaving C.renting D.borrowing we are not sure.什么意思 People are not sure who____(invent)TV. they are not the().They are different helen likes hamburgers very much( 改为感叹句( )( )helen likes hambergers!are they from cuba?i'm not sure.合并为一句i'm not sure( )they ( )from cuba. They are sure they will win the game.同义句 --Are they ( ) buuks?No,they are not .--They are ( ) buuks. The computers are supposed to save time but I’m not sure they （）A will B do C have D are选啥?说明理由 The computers are supposed to save time but I’m not sure they （）A will B do C have D are选啥?说明理由 they are sure they will win the game 的同义句改为they are sure()()the game