Some of the verb tenses seen in the book

Explicados de la mejor manera posible...

Present Simple:

https://www.youtube.com/watch?v=acmWhAjl7yA&list=PLJ5HA2yI-I8OnkX9QS5vK8jdqswg_-bV_&index=1

Present Continuous :

https://www.youtube.com/watch?v=3nZePx_YnEw

Present Continuous and Present Simple:

https://www.youtube.com/watch?v=xXeVOIRxViY

https://www.youtube.com/watch?v=GjqdToylBDg

Past simple:

https://www.youtube.com/watch?v=OcKx-XHpOtk&index=12&list=PLJ5HA2yI-I8OnkX9QS5vK8jdqswg_-bV_

Past Continuous:

https://www.youtube.com/watch?v=YW7G5nSx3As&list=PLJ5HA2yI-I8OnkX9QS5vK8jdqswg_-bV_&index=3

Future Perfect Simple:

https://www.youtube.com/watch?v=XdAZ4723_TM

Future Continuous:

https://www.youtube.com/watch?v=aTnxGl5MnJs