Chuyển từ danh từ số ít \(\rightarrow\)danh từ số nhiều(s, es) .
book \(\rightarrow\) ...... ; school \(\rightarrow\) ........
door \(\rightarrow\)....... classroom \(\rightarrow\)........
board \(\rightarrow\)....... ruler \(\rightarrow\) ........
clock \(\rightarrow\)........ eraser \(\rightarrow\)........
bag \(\rightarrow\)......... house \(\rightarrow\)............
pencil \(\rightarrow\)...... street \(\rightarrow\)..........
pen \(\rightarrow\)............
book →...books... ; school → ....schools....
door →....door... classroom →...classrooms.....
board →...boards.... ruler → ....rulers....
clock →.....clocks... eraser →...erasers.....
bag →....bags..... house →.......houses.....
pencil →...pencils... street →.....streets.....
pen →.....pens.......
\(book\rightarrow books\) \(school\rightarrow schools\)
\(door\rightarrow doors\) \(classroom\rightarrow classrooms\)
\(board\:\rightarrow boards\:\) \(ruler\rightarrow rulers\)
\(clock\rightarrow clocks\) \(eraser\:\rightarrow erasers\:\)
\(bag\rightarrow bags\) \(house\rightarrow houses\)
\(pencil\rightarrow pencils\) \(street\rightarrow streets\)
\(pen\rightarrow pens\)
books
doors
boards
clocks
bags
pencils
pens
schools
classrooms
rulers
erasers
houses
streets
book → books ; school → schools
door → doors classroom → classrooms
board → boards ; ruler → rulers
clock → clocks eraser → erasers
bag → bag ; house → houses
pencil → pencils ; street → streets
pen → pens
book → books
school → schools
door → doors
classroom → classrooms
board → boards
ruler → rulers
clock → clocks
eraser → erasers
bag → bags
house → houses
pencil → pencil
street → streets
pen → pens
pen →→............