Should / Shouldn't - English Grammar
INSTRUCTIONS
Should / Shouldn't - Answers. Check the answers for the Should / Shouldn't Exercise page.
Then go to the ...
Troubleshooting Page.

Albert Einstein
Why do you have to click the Start button to shut down? The same reason you turn the ignition key to shut off your car.Complete the sentences. Chose should / shouldn't. Then click the Check It button.
Then check that you know how to..... Have To - How To Form page.