In some cases , "let" can be used as a causative verb. The patterns are as in the following:
1. ACTIVE MEANING : LET SOMEBODY DO SOMETHING
Example sentences :
They didn't let me go with them.
She let us use her telephone.
A good boss lets his workers rest from time to time.
Stop the ball ! Don't let it roll into the street.
I haven't let my son eat ice cream.
2. PASSIVE MEANING: TO BE LET DO SOMETHING LET SOMETHING BE DONE
Example sentences :
The teacher usually lets the children play some games in the class .
1. The teacher usually lets some games be played ( by the students ) in the class .
2. The children are usually let play some games ( by the teacher ) in the class .
You should let your son Ali wash the car .
1. You should let your son Ali wash the car .
2. You should let your car be washed ( by your son Ali )
They let us leave early ( active )
We were let leave early . ( passive )
NOTE : "LET" can't normally be used in passive sentences . Instead , we use "allow to "
After questioning , he was let go . ( NOT normal )
After questioning , he was allowed to go . ( normal )
B. HAVE SOMETHING HAPPEN
We can use "have" in this pattern with the meaning "experience something" , often something unpleasant .
We had our passports stolen.
The car has had its aerial pulled off.
The tourists are having their luggage searched in customs.
C. HAVE SOMEBODY DOING SOMETHING
We use this form in the meaning of teach , persuade or encourage.
I will have you driving in three days. (=I will teach you to drive in three days.)
He had them all dancing. (= He taught them all to dance)
I have them all talking to each other. (=I encourage/persuade them all to talk to each other)
Will they really have people speak English in two months?
(= Will they really teach people to speak English in two months?)
* ... won't have somebody doing something ... " means " ... won't/allow this"
I won't have them sitting down to dinner in his overalls .
(= I don't/won't allow him to sit down to dinner in his overalls )