You ___ be serious? You want me to go skydiving with you on Saturday? No way, my friend!

When will you ___ come and see us in our new house?

You ___ worry all the time. Don't be so negative. You should be more optimistic about life.

We've worked long and hard today. ___ we call it a day?

I'm going to make a cabinet out of our spare wood pile. However, I ___ have to buy some extra wood for the finishing touches.

You moved all of the boxes out of the moving truck by yourself? You ___ be exhausted!

If you tell your boss off, you ___ surely be fired.

I may ___ able to come to your party if I have the time.

I could ___ bought that car but I didn't have enough money to pay for the petrol.

I ___ go to see the doctor last week because I was very ill.