I can swim across the river.
I can see you.
What can I do for you?
We can't carry the heavy box.
I'm sorry I can't help you.
I am afraid I must be going. Workers build buildings everyday.
Buildings are built by workers everyday.
I read comic books once a week.
Comic books are read by me once a week.
Ben writes a letter each week.
A letter is written by Ben each week
I can do it
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