I spent two hours on my homework.(改为同义句)

I spent two hours on my homework.(改为同义句) I spent two hours on my homework.同义句 I spent two hours doing my homework yesterday.(改为同义句） I spent two hours cleaning my room 改为同义句 I spent two hours doing my homework last night的同义句 I spent two hours cleaning my room(改为同义句） I spend two hours doing my homework a day.改为同义句.I ____ ____ I spent two hours on my homework一句中spend为什么要用过去式spent I spend two hours on my homework every day 改同义句 I usually spend two hours doing my homework.同义句 We spent two hours finishing our homework last night.（改为同义句） I spent（ ）（for;about）two hours on my homework last night