[grammar 7] infinitive 2

I worked hard to support my family.
I worked hard in order to support my family.
I worked hard so as to support my family.
I am happy to see you again.
She must be crazy to say such a thing.
She grew up to be a famous singer.
My grandmother lived to be 90.
He left the town 1975, never to come back.
I worked hard to pass the test, only to fail.
He was kind enough to help old people.
I got up so late as to miss the train.
It's too cold to go outside.
To hear her speech, you would take her for a scholar.
That river is dangerous to swin in.