I did a lot of Christmas shopping.a lot of为什么不可以换成 a piece of

I did a lot of shopping I did a lot of christmas shopping.a lot of 可以改成 a number of I did a lot of christmas shopping.怎么翻译? I did a lot of Christmas shopping.a lot of为什么不可以换成 a piece of Did you see a lot of I have a lot of homework___this evening.A.do B.did C.doing D.to do He finished the test quickly but he made a lot of mistakes,____A too did IB Neither did IC So did I D Nor did I I did a lot of work yesterday.改成以He为主语的句子 I used to watch a lot of TV(改为否定句)I did’t watch too much TV（）（） Jack,___you enjoy your summer camp?Yes.I knew a lot of new friends .A,do B,did C,were She lost a lot of money.I didn't know how she did so.为什么去掉so? 改成被动语态:Did Jack make you homework for him.I can't buy a lot of things for myself. 英语一般过去时的第一人称变化,do应怎样变I did a lot of work yesterday 改成He为主语 刚学很弱智的.2I do a lot of work every day.换成He开头的主语就是 He does a lot of work every day.(但三do变does吧)可是如果是过去式.I did a lot of work yesterday.那么如果用He开头做主语.应该怎么变?He did a lot of Did you have a lot of fun on your birthdayparty? jimmy did a lot of yesterday这一句什么意思 They did some s____and bought a lot of things Did you see a lot of animals中文意思