with so much work (remain) to be done

with so much work (remain) to be done 非谓语动词部分with so much work ( ) to be done,he looked very worri there is so much work to be done和I have so much work to do. 改错 I had much work to be done ,so I was very busy he has (much) work (to be done),(so)he was very busy.括号里那儿错了 remain to be done和remain seated 区别. remain done ,remain to be done以及remain doing 的区别 With so much work to do,I can't go. ----------,the work can be done much better. So much to do,so little done,such things to be. remain to be done是否等于remain doing?need doing是否等于need to be d much work is to be done.句中 is to 是什么用法?有将来意义吗?