be willing to do sth=be will to do sth?

be willing to do sth be willing to do sth difficult是什么意思? will do sth, be about to do sth, be to do sth, be going to d 用be eager to do sth.和be willing to do sth.造句 be willing to do sth 与be ready to do sth的区别 be to do sth和will do sth的区别 There will be sb to do sth be happy to do sth be let to do sth be surprised to do sth be able to do sth be obliged to do sth.