Finally, a grammar tip I can understand: For most nouns, the singular is turned to a plural by adding an œs, (song “> songs).
Other tips:
Words that end in ˜x’ ˜sh’ ˜ch’ ˜s’ ˜z’ “> add an ˜es’ (box “> boxes)
Words that end in a consonant + ˜y’ “> drop the ˜y’ and add ˜ies’