Stacks is the best construction kit to learn, test and practice English tenses with 12 grammar bricks only!
It's Fast, Easy, and a way more funny than a boring tables cram.
5 levels to go - from 10 tasks in the easiest one up to 5-4 in the others. 6th level is to practice and test to make your grammar use self-acting.
Tasks are made as ideas of what has to be said and then you have the best construction kit ever to build that.
It's even possible to solve each task just picking out the bricks and their sides. If you face some troubles don't hesitate to press [Help] - you won't miss anything!
Practice with Stacks for few minutes per day and soon right constructions will easily appear in your mind.
Please start with level 1. You can find a task to do on top of the screen. Try to guess for a moment how would you solve that task or press HELP to check out the right construction. It's better to choose a brick with pronoun first - I, YOU, IT. Click a brick once to switch its side, click and hold it to start dragging. Put a brick in one of the boxes on the white field. You can see a warning hint if brick is wrong or has a wrong place. Repeat those steps with other bricks until all the boxes are filled in without warnings. If you still don't get green OK button then try to switch some bricks' sides. Also you can press HELP to check out the right construction and then press any screen place to go ahead to a new but similar task. When OK button becomes green you can run the next task, and so on to pass a level.
In 6th level you can have many tasks from other 5 levels - to practice all you already know and not only - but in random way and with less of hints.