go to sw to do sth --!

go to sw to do sth --! 为什么visit sw.中sw.是作宾语,而go to sw.中to sw.是作状语?那look forward to sth.中 to sth.做什么成分?不及物动词+介词+宾语 都是作状语的么？ 不及物动词+介词+宾语,是作状语还是什么?例如go to sw.中 to sw.是作状语么?为什么不是作宾语?又如like to do sth中 to do sth 是作什么成分啊?是不是应该做宾语?这应该怎么理解啊?look forward to sth.中 是go out to do sth. go on to do sth ,go on doing sth,go on with sth有什么区别 用英语句型造句,每个句型造五个句子help oneself to sthbe helpful to sb3.be friendly to sb4.be glad to do sthask sb about stn6.tell sb (not) to do sth7.tell sb about sth 8.give sb a call9.call sb back10.forget to do sth 11.go to sw for a do sth to do 初中英语概念有无go on to do sth 和contine to do sth? go on doing sth,go on to do sth,continue doing sth,continue to do sth,keep doing sth它们有什么区别 go out of myself way to do sth going on doing sth go on to do go on a visit to sw是否等于travel to sw go no doing sth 和go on to do sth的区别 go doing sth.和go to do sth.有什么区别 go on to do sth 和 go on doing sth 有什么区别 go on to do sth.和 go on doing sth.有什么不同? go on to do sth.与go on doing sth.这两者有什么区别 go back to do sth 和 go back doing sth 求区别