同义句I don't know when I can start the new lesson=I don't know---the new lesson

i don't know 同义句 I don't know?的同义句 I don't know改成同义句 I don't know when I will come back改为同义句 I don't know when I should start（同义句 ）（五分钟答出的, I don't know what I should do when there is a fire同义句 I don't know when I shoud start 同义句转换 i don't know when i should have the party改同义句 I don't know when I will finish my homework改为同义句 同义句I don't know when I can start the new lesson I don't know when he can go back home.如何改为同义句 I don't know when the Greens will go back to England.变为同义句 I don't know when I will start.改同义句：I don't know when ——— —————. I don't know等于I've( )( ).同义句 I don't know.------I've ( ) ( ). I don't know when I can post this letter .I don't know when I can post this letter.(改为同义句）I don't know ( ) ( ) ( ）this letter. I don't know when I can post the letter.改为同义句I don't know ___ ___ ___the letter.请问这是什么句型?为什么这么填? 同义句I don't know when I can start the new lesson=I don't know---the new lesson I don't know what I wear today.(改为同义句) I don't know () () () today.