(CM-041) -s or -es / don't or doesn't / -d or -ed

[Write 2 Speak]

122. The -s or -es of the third person singular omitted
(X) He speak English very well.
(O) He speaks English very well.
Note: Take great care not to leave out the -s or -es from the present tense
when the subject is he, she, it, or a noun in the singular

123. Using don't instead of doesn't
(X) He don't care what he says.
(O) He doesn't care what he says.
Note: Use don't (= do not) with I, we, you, they, and with plural nouns.
Use doesn't (= does not) with he, she, it, and with singular nouns.

124. The -d or -ed of the past tense omitted
(X) I receive a letter yesterday.
(O) I received a letter yesterday.
Note: Take care not to leave out the -d or -ed from the past tense of regular verbs.
When speaking, pronounce the ending of the past tense clearly.