Certain verbs can be used to express a causal relationship between the subject and object in a sentence. Some of them require a “to” while others do not. Note the following patterns:
With “to”
S + V + O + to V (O)
I allowed Jim to clean up the mess.
I asked Jim to clean up the mess.
I told Jim to clean up the mess.
I persuaded Jim to clean up the mess.*
Without “to”
S + V + O + V (O)
I let Jim clean up the mess.
I had Jim clean up the mess.
I made Jim clean up the mess.
*Other verbs which use this pattern are require, command, force, remind, and urge. The verb help can be used with or without “to”: Help Jim (to) clean up the mess.
Some verbs use the pattern, S + V that S + V (the second verb is in the base form)
I insisted that Laura do her homework.
I suggested that Laura do her homework.
I recommended that Laura do her homework.
(not “does”)
*Other verbs which can be used with this pattern are ask, require, and demand.
The most common error with causatives is using “to” unnecessarily. For example,