In the first unit we study what is related to our childhood using the simple past that implies that all regular verbs attach "ed" except for one or another verb, and using the "when I was" and this was that I saw in this unit.

Also in the second unit, we made a manual to talk about how to behave and act in some sports areas, we also use "Must and I have to" "Too much and enough".

And to end the semester we enter the subject of Gerundio or infinitive that consists of using the gerund after the prepositions and use infinitive after the adjectives. 
We also saw the active voice and the passive voice in the 3rd unit, which consists of transforming what we say from active to passive and the result would be a change of positions between the subject and the object leaving the verb in the time it is.

this is all friends.