We must clean the classroom every day.He swept the floor yesterday.Jim bought a new bike last week.Adison invented the light bulb.改为被动语态
问题描述：
We must clean the classroom every day.
He swept the floor yesterday.
Jim bought a new bike last week.
Adison invented the light bulb.改为被动语态
答
the floor was swept by him
last week a new bike was bought by jim
the light bulb was invented by adison
答
The classroom must be cleaned every day
The floor was swept yesterday
A new bike was bought (by Jim) last week
The light bulb was invented by Adison