For the ones who prefer shorter riddles ...
One-task Activity
Have Sth Done
Comparative Adjectives
Superlative Adjectives
A or AN
Adjectives With The -ed Or -ing Suffix
Can | Can't | Sentences and Questions
Clocks Quarters And Halves
Embedded Questions | IF | No Question Words
Gerund Or Infinitive
Going to
Have Haven't Has Hasn't
Half Past Quarter Past No Clock Faces
In On Under
Half Past Quarter Past With Clock Faces
Irregular Verbs Starting With Letters A-L
Irregular Verbs Starting With Letters M-Z
IN ON UNDER NEXT TO BETWEEN BEHIND IN FRONT OF
Quarter Past Quarter To
ME | YOU | HIM | HER | IT | US | YOU | THEM
Third Conditional
There Is There Are
Second Conditional
Question Tags
Possessive Adjectives
Reported Questions | No Time Expressions
Reported Speech | No Time Expressions
To be positive negative | Nationalities
First Conditional
Uncountable Nouns
Passive
This | That | These | Those
This | That
These | Those