There is a bird in the tree. Can you see a bird?
There are birds in the tree. Can you see birds?
There is a new museum in the street. I visited a museum last Saturday.
By the way, did you go to the school at the age of six?
I have English five times a week.
Mr. Porter's son goes to the London twice a year.
Porters go to the United States once a year.
Mike and Ted's brother goes to the Hyde Park once a week.
Kate's little sister has a milk five times a day.
Mrs. Green's choldren do to the Natural Histury Museum once a month.