做主语:To see him is my purpose.
To win this game is my ambition.
To travel aboard has long been my dream.
To learn English is difficult.
To ask for help is easy.
做定语:I borrowed some books to read during my holiday.
He told me he had a composition to write.
I want to get something to drink.
She has nothing to worry about.
He was the last one to arrive.
做表语: My plan is to see him.
His goal is simply to be a teacher.
My wish at present is to sleep.
The enemy's attempt is to occupy this area.
My dream is to be a doctor.
做状语: I come specially to see you.
I go to shop to buy a pen.
They will go to the station to meet the guests.
He hurried through his work in order to / so as to catch the train.
He returned home to learn hisQHwgKcP daughter had just been engaged.

目的状语：To
get
there
in
time,
he
drove
his
car
very
fast.
结果状语：He
searched
the
room
only
to
find
nothing.方式状语：暂时没想起来。表语：To
be
kind
to
the
enemy
is
to
be
cruel
to
the
people.宾补：Father
will
not
allow
us
to
play
on
the
street.定语：Have
you
anything
to
be
taken
to
your
sister?
原因状语：I'm
glad
to
see
you.

不定式做主语：To
dance
is
a
lot
of
fun
跳舞非常有趣
不定式做表语：The
best
plan
is
to
leave
at
once.最上策的计划就是马山离开这里。
不定式做宾语：They
began
to
read
and
write.他们开始读和写。
不定式做宾语补足语：Lucy
told
him
not
to
cry.路希告诉他不要哭。
不定式做壮语：He
came
to
give
us
a
talk
yesterday.他昨天来（为了）给我们做报告。
不定式做定语：Have
you
got
anything
to
say?你还有什么要说的吗？

其实你掌握基本方法就行了。动词+
to
do
sth【动词不定式作宾语】，常见的有：want,hope,wish,offer,fail//www.souquanme.com,plan,learn,pretend,refuse,manage,help,agree,promise,prefer。如搜趣网：He
wants
to
go
home.
He
hopes
to
visit
his
teacher.
动词+
sb
to
do
sth【动词不定式作宾补，因为不定式是宾语的动作】不定式作宾语补足语的动词有：advise，allow，ask，beg，cause，direct，encourage，expect，forbid，force，invite，order，permit，persuade，remind，re-quest，require，teach，tell，want，warn等。如：
He
advised
me
to
give
up
smoking.
He
allowed
me
to
leave
a
little
earlier

例如：I搜趣网 want to go with you.我想和你一起去。很多动词后面都可以加动词不定式作宾语的。