Hay cho danh từ số nhiều của nhưng từ sau :
1. earser ..................
2. watch...................
3. engineer .............
4. clock ..................
5. bookshelf............
6. person ...............
7. foot ...................
8. nurse .............
9.knife ...............
10. country .......
11. child ............
12. potato ...............
13. man ...............
14. boy .................
15. library ..............
\(1earser\rightarrow earsers\)
\(2watch\rightarrow watches\)
\(3engineer\rightarrow engineers\)
\(4clock\rightarrow clocks\)
\(5bookshelf\rightarrow bookshelves\)
\(6person\rightarrow people\)
\(7foot\rightarrow feet\)
\(8nurse\rightarrow nurses\)
\(9knife\rightarrow knives\)
\(10country\rightarrow countries\)
\(11child\rightarrow children\)
\(12potato\rightarrow potatoes\)
\(13man\rightarrow men\)
\(14boy\rightarrow boys\)
\(15library\rightarrow libraries\)
1. earser ...earsers...............
2. watch......watches.............
3. engineer ...engineers..........
4. clock ....clocks..............
5. bookshelf....bookshelves........
6. person ...people............
7. foot ........feet...........
8. nurse ........nurses.....
9.knife .....knives..........
10. country ...countries....
11. child .....children.......
12. potato .......potatoes........
13. man .....men..........
14. boy ......boys...........
15. library .....library.........
