Chuyển câu sau sang thể phủ định: It is a pen.
It isn't a pen.
Chuyển câu sau sang thể phủ định: Nam and Ba are fine.
Nam and Ba aren't fine.
Chuyển câu sau sang thể phủ định: They are twenty.
They aren't twenty.
Miss. Nhung (ride )........ her bike to work.
rides
The children (play)................ in the park at the moment.
are playing
Look! The bus (come) .............
is coming
What ............... you (do).............at your free time, Nam? - I often (read) ................ a book.
do you do; read
