TOEFL Primary · Step 1 · Book 1
Grammar — Unit 1: a / an & Nouns
Learn when to use a or an, and tell countable from uncountable nouns. Look at each picture and choose — answers check instantly, free, no sign-up.
📚 Grammar tip — Singular Nouns
Use a before a consonant sound. a cat · a boy · a table · a book
Use an before a vowel sound (a, e, i, o, u). an apple · an eye · an elephant
Some nouns are uncountable — you can’t count them one by one. water · milk · bread · meat · salt · sugar · money · rice
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