Recursos 

Online Dictionaries

Reverso Dictionary ( English- Spanish / Spanish -English)

Cambridge Dictionary   ( English )

Oxford Dictionary (English)

Picture Dictionary  ( Picture and Advanced Vocabulary)

Pronouncing Dictionary (With Instant Sound)

Slang Dictionary  ( Very Informal Words and Expressions )

This funny page will let you make up basic comic stripes.

Comic creator 

Problems with them? English Grammar Secrets helps you with two exercises. The first exercise is just to warm you up and shouldn't cause you much difficulty, you only have to mix and match. The second exercise is a bit more complicated.