Modal verbs

Here you can watch a video that explains modal verbs. In the description of the video you have more information about modal verbs. How to learn the use of modal verbs?

Just practice. The more you practice better. With time and practice and a little bit of understanding the use of them will become automatic. Eventhough, don't worry too much if you still make small mistakes, people will understand you.

Then you can practice with these exercises. In this link. If you make a mistake in a sentence, copy that sentence in your notebook. 

Remember that reading and listening will also provide you with a good practice in the use of modal verbs.