A/An
A/An
singular to plural
irregular plurals
there is - there are
100

Doctor

A doctor

100

ball

a ball

100

lunch

lunches

100

man

men

100

______ any schools near here?

are there

200

Student

A student

200

apple

an apple

200

tax

taxes

200

child

children

200

______ any girls in today´s English class?

are there

300

engineer

an engineer

300

interesting class

an interesting class

300

family

families

300

tooth

teeth

300

______ a problem with your computer?

is there

400

university

an university

400

uncle

an uncle

400

loaf

loaves

400

person

people

400

I can see ________ a lake near the city.

there is

500

umbrella

an umbrella

500

honest man

an honest man

500

brush

brushes

500

ox

oxen

500

Can you tell me if _________ trees in the school?

there are