be obliged to do sth.

be obliged to do sth. 有谁知道be obliged to do be obliged to do和feel obliged to do一样吗?be obliged to do和feel obliged to do一样是被迫做某事的意思吗? be obliged to do和feel obliged to do一样吗? feel （obliged） to do sth 请问obliged 是什么词性的?feel （obliged ）to do sth 请问obliged 是什么词性的?是动词的过去分词,还是形容词?如果是动词的过去分词,那feel 是作为be动词吗? be sure to do sth. be pleased to do sth be able to do sth be going to do sth be let to do sth? be sad to do sth. be made to do sth be used to do sth. be to do sth和will do sth的区别 be worth to do sth 还是be worth doing sth be scared to do sth还是be scared doing sth be surprised at sth.和be surprised to do sth. be glad to do sth 还是be glad doing sth