Grammar 
Conditional - 'If'
Definition
Riddle: "What can speak every language in the world?" <answer below>
Conditional Auction
Sentences are auctioned off to students and they must say must say if the sentence is grammatically correct.
Students listen to sentences spoken by the ALT/JTL and must do whatever they are told.
Moshi, Moshi
Students try to make as many sentences as possible before completing a worksheet. This activity is good for struggling classes and/or as a first-time activity, following the introduction.
Students practice listening and solve puzzle.
Answer: "An echo."