Because prices of food and clothing and almost everything else in that country have steadily gone up, the buying of the dollar has gone down.
Look at that little boy wandering about — perhaps he _____ his mother.
“Did Jim come?” “I don’t know. He _______ while I was out.”
“Look at these tracks. It _______ be a wolf.” “Don’t be so sure. I think it _______ be a fox.”
“Show me your permit, please.” “Oh, it’s not in my pocket. It ______.”
“Is there a flight to London this evening?” “There _______ be. I’ll phone the airport and find it out.”