Aprende a combinar el pasado simple, el pasado progresivo y el pasado perfecto para contar historias.

Learn how to form and use the passive voice in the most common English tenses.

Aprende a expresar obligaciones, necesidades y consejos con have to, must y should.

Learn to describe nouns with adjective clauses.

Choose the past participle after auxiliary have, has, or had in perfect tenses.

Learn how paired comparatives express a relationship between two changing situations.

Choose a comparative for two things and a superlative for one member of a group.

Learn to form and use comparative and superlative adjectives correctly.

Learn to make logical, parallel comparisons in TOEFL grammar questions.

Learn how to use paired conjunctions with balanced grammar.