Exercises - plural of nouns

Put the words into the plural form:

friend = friends *Note: Os adjetivos (happy, blue, etc.) não têm plural.
sister = ----------
brother = --------
teacher = --------
pencil = ----------
ruler = -----------
window = --------
schoolbag = ------
girl = ------------
big table = -------
brown door = ----
old chair = -------

Rewrite the sentences in the plural form:

My teacher is happy.
My teachers are happy.

1. The boy is angry, but the girl is not.

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2. My English book is black and red.

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3. The door is blue, but the window is black.

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