worker - workers      

book - books

ruler - ruler

pencil - pencils

student - students

bookshelf - bookshelfs

coach - coaches

table - tables

television - televisions

family - families

car - cars

door - doors

bag - bags

eraser - erasers

desk - desks

teacher - teachers

doctor - doctors

watch - watches

stool - stools

orange - oranges

city - cities

motorbike - motorbikes

window - windows

desk - desks

house - houses

classroom - classrooms

engineer - engineers

nurse - nurses

bench - benches

telephone - telephones

bus - buses

country - countries

bike - bikes

clock - clocks

school - schools

pen - pens

street - streets

chair - chairs

brother - brothers

lamp - lamps

stereo - stereoes

plane - planes

baby - babies

kite - kites

*Thêm -es- khi tận cùng từ bằng -s,-ss,-ch,-sh,-x,-z,-o,-ge,-ce

*Thêm -s- khi tận cùng từ bằng các từ còn lại

*Các từ tận cùng bằng y, nếu trước y là phụ âm thì ta đổi y thành i rồi thêm -es-, nếu trước y là nguyên âm thì chỉ cần thêm -s-