1. The Objective Infinitive Construction
After verbs denoting sense perception
without to
see, feel
hear, watch,
notice, find perceive, observe
I saw him cross the street.
A heard my wife come…
After verbs denoting wish and intention
with to
want
wish
like
desire
Intend
hate
Father wants me to come on Sunday.

2. After verbs denoting mental ability
with to
know,think
consider,suppose
understand
expect,imagine, believe
We believe him to finish the work in two days.
After verbs denoting compulsion
without to
make
get(to)
have
let
She made him drink some milk.
I can not get her to finish her lessons.
After verbs
of declaring
tell, ask, order, command,
allow, pronounce
The doctor pronounced the wound to be a slight one.