It conjugates different to other verbs,

It doesn't need an auxiliary verb to form negative or interrogative sentences

Sometimes this verb acts as an auxiliary verb,( for example in continuous tenses)

A modal verb is a HELPING verb, we always find can followed by another verb.

It gives the principal verb an extra meaning of

ability (I can play the piano, sé tocarlo),

possibility (we can go to the park if you want to, es una posibilidad),

permission (you can't go to the cinema, no tienes permiso),

capability (you can do it if you really try, tienes la capacidad),

offer (Can I help you?, ofrezco ayuda)...

This is a way of expressing possession, we are really doing it by using the verb get in present perfect. It might result a bit difficult to understand in early stages of learning but soon you'll understand why it works different to the verb have in present simple. (don't worry too much about it)

We use the present continuous to talk about actions that are happening in this moment.

The auxiliary verb used in this tense is the verb to be.

Some of the time expressions we find in present continuous sentences include now, right now, at the moment and expressions such as Look! or Listen!

We use the continuous with action verbs NEVER with stative verbs (these are verbs that express possession, mental processes or feelings)

In this diagram you'll find the differences between both tenses.