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take part in the charity show
A: What is the plane used as?
B: It is used as a hospital.
A: Yes. It isn’t used as a sports centre.
B: What was done by the volunteer doctors just now?
A: An operation was done by them just now.
B: Yes. The cleaning work wasn’t done by them.
Many trees are planted in spring.
Many trees aren’t planted in winter.
Lights were turned off to protect the Earth last year.
Lights weren’t turned on in some
houses last year.
Work out the rule!
◆ is/am/are + done
is/am/are not + done
was/were not + done
◆ was/were + done
The simple present tense
The simple past tense
negative sentence structure
Form the passive voice
Can Tom catch Jerry?
At last, Jerry was caught by Tom.
active voice
passive voice
active voice
passive voice
I made some bread.
Some bread
me.