1."to fly to Beijing to visit her"在本句中是不定式,作plan的賓語(yǔ).類似plan后面接 to do 作賓語(yǔ)的動(dòng)詞有：
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分詞作賓語(yǔ)的動(dòng)詞:
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分詞,且意義變化不大的動(dòng)詞：
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分詞,意義有較大變化的動(dòng)詞：
動(dòng)詞 后接不定式的意思 后接-ing分詞時(shí)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 記得要去做… 記得曾做過…
forget 忘記要去做… 忘記曾做過…
regret 很遺憾要做… 后悔做了…
mean 打算/有意做… 意味著…
stop 停下來去做…(另一件事) 停止正在做的事…
try 努力去做… 嘗試做…
go on 接著做…(另一件事) 繼續(xù)做(同一件事) …
eg.He forgot to close the door when he left.(忘了去做某事,to do未發(fā)生)
I’ll never forget winning my first gold medal.(忘了做過某事,doing已發(fā)生)