非谓语动词的动词不定式的问题Her mother plans to fly to Beijing at least four times a year to visit her 这里面 to fly to Beijing to visit 都是动词不定式么 这些动词不定式在句子里当什么成分

plan to do sth这里是做宾语，plan是谓语，后面的不定式做宾语
fly to Beijing 这里是做状语，飞到某个地方去
to visit her 这里是目的状语，一般名词后的不定式做目的状语
可能经常还会见到在形容词后的不定式，比如It is nice to see you.这里是做原因状语
回答完毕 请加分！

1."to fly to Beijing to visit her"在本句中是不定式,作plan的宾语.类似plan后面接 to do 作宾语的动词有：
hope,refuse,decide,expect,agree,manage,offer,pretend,promise,plan,afford,
would like/love/prefer等
eg.They hope to findnew resources for mankind.
I want to write to you—but don’t have your address.
2.只接-ing分词作宾语的动词:
admit,allow,imagine,delay,consider,mind,understand,avoid,enjoy,practice,miss,finish,keep,suggest,feel like,cannot stand,put off,keep on,look forward to 等.
eg.I enjoy listeningto music.He often practicesplaying the piano in the evening.
He is fond of playingbasketball.He has given upsmoking.
Would you mind turning down your radio a little,please?
3.可接不定式和-ing分词,且意义变化不大的动词：
love,hate,prefer,begin,,start,continue等 (dislike,feel like)
Examples::
I like to swim today.
I like swimming verymuch.
I started learning English when I was ten.
It began to rain when I got home last night.
I continue to feel sick.
I hate to see you crying.
4.可接不定式和-ing分词,意义有较大变化的动词：
动词 后接不定式的意思 后接-ing分词时的意思
need 需要做… 需要被…(=need to be done)
want 想要做… 需要被…(=want to be done)
remember 记得要去做… 记得曾做过…
forget 忘记要去做… 忘记曾做过…
regret 很遗憾要做… 后悔做了…
mean 打算/有意做… 意味着…
stop 停下来去做…(另一件事) 停止正在做的事…
try 努力去做… 尝试做…
go on 接着做…(另一件事) 继续做(同一件事) …
eg.He forgot to close the door when he left.(忘了去做某事,to do未发生)
I’ll never forget winning my first gold medal.(忘了做过某事,doing已发生)