Causatives

We use 'causatives' when we know that the subject did not do the action on their own. Actually, the subjects in causative sentences lead someone else to do the action.
Here are the examples which can help to understand the concept:

Causative sentences are made of two clauses. The first clause consists of the 'causative verbs' and it is called the main clause, while the second clause consists of a 'participle,' 'to-infinitive,' or a 'bare infinitive' and it is called a non-finite clause. Both these clauses are subordinate clauses that are not complete without each other. Causatives are made of four main factors:

Most causative verbs such as convince, enable, cause, allow, force, lead, etc. are followed by a 'to-infinitive' but the most common and important causative verb in this group is the causative verb 'get.' Check out the examples:

Have, let, make are consecutive verbs, (also called catenative verbs or linked verbs) that cannot be followed by to-infinitives. So, as causative verbs, they are just followed by the 'bare infinitive.' Here are some examples:

The verb 'help' is called a semi-causative, because if we consider its meaning, it will get obvious that the verb is not causing something; it is actually playing a role in completing the action.
After 'help' you can use whether a 'bare infinitive' or a 'to-infinitive.' Using a 'to-infinitive' is considered more formal and using a 'bare infinitive' is less formal.

The 'indirect object' is used directly after the causative verb. An 'indirect object' in causative voice is called the 'agent' and it can be a thing, person, proper noun, or an object pronoun. For example:

A non-finite clause is added to the main clause. Non-finite clauses can be made of:

Among non-finite clauses that are mentioned above, you are familiar with clauses that are formed by the to-infinitive and the bare infinitive.
Some non-finite clauses are formed by present participle (v + ing) or past participle.
Only a few causative verbs (get, have, keep) are followed by participle non-finite clauses.

Passive voice with causative verbs are categorized into two groups:

Passive voice with the causative verbs 'get and have' are different from the other causative verbs.
When we make passive sentences with get and have we omit the agent because it is not important to know who did the action. Look at the examples for more clarification:

With other causative verbs, you do not omit the agent. In fact, as usual, you just omit the subject and use the agent as the subject of the passive causative statement. Check out the examples:

The causative verb 'keep' is only used with present participles because it means to make something maintain in the same situation for a while so it is used in continuous form. Here are a few examples to help you learn.
Remember you cannot use 'keep' in passive form.

Causative verbs are used to indicate an action that is done by the company of two or more people. In this structure, the subject does not directly do the action. Here are different participants of the causative structure.