Adhara's Prezi presentation

Here you can find Adhara's Prezi presentation.

Subjunctive

A webpage on the use of subjunctive is hereby made available.
 
Here you can find more information with exercises on the subjunctive and unreal uses past forms.  Here is the key for the exercises. 

American vs. British English

Here you can find a list of the main differences between American and British English. (Source: English Grammar in Use: Intermediate by Raymond Murphy)

Subject-Verb agreement

You can find a document on subject-verb agreement with exercises here.  The key for the exercises is available here.

Another document  is hereby available. 

Timoteo's presentation

Here you can find the slides Timoteo used for his presentation.

Composite nouns and possessives

Here you can find some information on composite nouns and possessives with exercises, as well as the key for the exercises. I am hereby also making another document on the same topics with exercises, as well as the key for the exercises.

Gerund vs. infinitive

Numerous exercises on gerund vs. infinitive along with their key are hereby made available for you to have access at your convenience.  You can also find the list of verbs used with gerund and/or infinitive here.
Here you can find more information and exercises on the same topic.