HW ex. 157 & ex. 2 p. 158
3. pronomini + TO-inf.
There was no one / nobody ta talk with.
4. kysymyssana + TO-inf.
I didn't know what to say.
I don't know who(m) to trust.
He didn't know how to solve the proble m
NB! "Why bother?"
"Why not toss the coin, Mr. Corleone?"
5. tavallinen verbi + to.inf
I want to go now.
He claims to be a very good cook.
I try to understand you.
6. passiivi + to-inf.
Max was known to have lied all his life.
It is known to have been built in a hundred years.
7. tarkoituksen ilmaiseminen / finaalinen rakenne
Many people moved to Australia (in order) to have a better life.
NB! I didn't say anything so as not to hurt anybody's feelings.
8. lauseenvastikkeena
This is the best book to read.
He was the first person to arrive.
I am the last person to give up.
9. subjektina
To know you is to love you.
10.   predikatiivia
To know you is to love you.

mandatory = compulsory =  obligatory