Massachusetts Curriculum Frameworks
MA.L.3. Grade 3 Language Standards [L]
Conventions of Standard English
L.3.1. Demonstrate command of the conventions of standard English grammar and usage when writing or speaking; retain and further develop language skills learned in previous grades. (See grade 3 Writing Standard 5 and Speaking and Listening Standard 6 on strengthening writing and presentations by applying knowledge of conventions.)
L.3.1.g. Form and use regular and irregular plural nouns and the past tense of regular and irregular verbs.
L.3.2. Demonstrate command of the conventions of standard English capitalization, punctuation, and spelling when writing.
L.3.2.e. Form and use possessives.