Chuyển câu sau sang câu bị động :
When i saw him , he was reading a book
-> When he was seen by me, a book was being read by him
-> When he was seen by me, he was reading a book
Chuyển câu sau sang câu bị động :
When i saw him , he was reading a book
\(\Rightarrow\) When I saw him , a book was read by him .
When i saw him , he was reading a book .
\(\Rightarrow\) When I saw him , a book was being read by him .
when he was seen by me, a book was being read
