One of the most things that I remember are the "tag questions".

Tag questions:

They help us to give us extra information, they have characteristics, and it depends about  the tag questions.

-A positive verb, takes a negative question.

Example: -Andrew isn't at home, is he?

-A negative verb, takes a positive verb:

Example:- It isn't cold today, is it?

Sometimes if we don't have a verb, we have to use the same auxiliary verb used in the tag as in the main clause.

Other of the important things are the CAUSATIVES.

 We use them  to indicate that something or someone cause something in a thing or person.

We have many causatives:

-HAVE: we use it to give responsability to someone.

Example: the teacher had us clean the classroom.

-MAKE: We use it to force someone do something.

Example: My mum make me wash the dishes.

-GET: We use it to convine.

Example: My dad gets my brother to fix the car.

in the case of get, always takes the preposition "to"...