帮忙看看这句I saw him at work,为什么要用at,不能用to吗

帮忙看看这句I saw him at work,为什么要用at,不能用to吗 i saw him yesterday改为否定句 She w at him in the car when she saShe w at him in the car when she saw him. I saw him before going home.的同义句I saw him ___ ___ ___home. I saw him reading a newspaper at eight this morning这句话的意思是什么? I saw him singing in the room.改为被动句 帮忙看看这句英语是否有语法错误Therefore,I should be remembered him所以,我要记得他/记住他. 英语倒装句的问题I saw him only yesterday.Only I saw him yesterday.这里为啥不用倒装啊? I saw him come into the classroom.（同义句） I saw him ———— the classroom. 急,请帮忙翻译这句英语的意思?Alice also of course I saw. Seat的用法I saw him seated at the back of the classroom.I saw him seating himself at the back of the classroom.两句都对 see sb.doneI saw him seated at the back of the classroom.这句话seated是不是省略be?能不能把这句话写成：I saw him be seated at the back of the classroom.I saw him who was seated at the back of the classroom. home,at,movies,the,latest,saw,I.连词成句 i didn't laugh at him.instead ,i helped him 同义句I helped him ____ ____ ____ at him. 改错.He mustn't be at home.I saw him here just now. 英语主动变被动I saw him playing football at that moment. 如何变被动 We met at the same restaurant where I saw him last time这个句子对吗 i saw that she was doing her homework at that time.同义句i saw her homework at that time.