This webpage will randomly ask you to build 25 short sentences from given prompts.
To check your work, press the "Correct"-button. The webpage will tell
you how many expressions were correct and the wrong ones will be
automatically removed.
In case you really don't know the answer, press the "Help"-button to get the next solution.
Examples:
be (perfect, I +): I have been.
be (perfect, you, -): You haven't been.
be (perfect, he, ?): Has he been?