Charlie is so young that he can't take the underground alone.(改为简单句)
Charlie is to take the underground alone.
I have studied English for four years.(对画线部分提问) ________ ________have you studied English?
I spent two hours cleaning my room yesterday.(改为同义句) It________me two hours________ ________my room yesterday.
Harvey had a great time at Water World last Sunday.(改为同义句) Harvey________ ________at Water World last Sunday.
(上海)John asked,“Can you look after my pet dog while I’m away?”(合成宾语从句) John asked________I________look after his pet dog while he was away.
Has your brother finished his homework?(作肯定回答) Yes,________ ________.