these和they的区别mum，they are my friends,Jim and Mary.比如说这个病句，为什么they要改为these

these和they的区别mum，they are my friends,Jim and Mary.比如说这个病句，为什么they要改为these mama和mum的区别 mom和mum的区别 Mummy和Mum的区别. 关于they these those什么时候用they什么时候用these什么时候用those?关于它们的区别和用法 these和this 的区别 these,this,that,those,it,they等的用法和区别 No,these aren't和No,they aren't的区别 Whose tapes are these?和Whose tapes are they?的区别. they are和they're的区别?如题are these your grandparents?_____.a.yes,these are.b.yes,they're.c.yes,they are.d.these are. the children 和 these children 的区别children 不是复数吗?不是应该用 these children吗?the children和these children 翻译过来有什么区别呢? a 和 the的区别Mum,where is my CD player?It's in ___white bag on your desk. these和those的用法和区别._____are my books.They are cheap .They are over there._____are yours .They are thinner.They are here.第一题为什么用those,第二题为什么用these? mom和 mum区别mom和mum有什么不同? the leaves 与 these leaves 的区别 what is this和what is that的回答与区别 what are they和what are these/those的回答与区别.是this is /that is.还是it is /it's是they are these are /those are 英语翻译what’s in the box,mum?a shirt.what colour is it?it’White.mum,is this your coat?yes' it's my orange coat.what are these ,mun?oh,they are dad's black trousers.mum,are those my new shoes?yes.what colour are they?they are green.（翻译! this these those的用法和区别