I love using chain drills to get kids practicing full sentences. This is used as a race, and if you have multiple sections of a class, they can race against each other; otherwise, with just one section of a class, they can race to get a pre-set time goal that you make.
This activity gets kids speaking FAST and they really get their sentences nailed DOWN! It teaches them to listen and understand what the person who goes before them says as well.
The first two pages are directions on how to make a chain drill and how to run it in class. The third page is an example in English.