Positive sentences make statements about facts and things that are true. They don't use 'no' or 'not' words. Can be formed into past, present, and future tenses. Past tense uses 'did', 'was/were', 'had', 'would', 'could'. Present tense uses 'am', 'has/have', 'is/are', 'verb-ing'
The verb "do" has four forms: present (do/does), past (did), and past participle (done). Present tense uses "do" for I/you/we/they, "does" for he/she/it. Past tense uses "did" for all subjects. Past participle requires "have/be" in correct tense
Describes regular actions, facts, habits and general truths. Used for repeated actions in present time period. Expresses facts about people, objects and situations
"Isn't" and "aren't" are contractions of "is not" and "are not". These contractions are used for negation in both spoken and written English. The verb "to be" changes based on tense, mood, person, and number
Negative sentences express untrue statements using "not" between auxiliary verb and main verb. Most common auxiliary verbs are be, have, do, and modal verbs. Can + not usually forms "cannot"
Tom doesn't work at weekends. I don't want to go out this evening. Gary isn't working this week, he's on holiday. My parents don't go out very often. Nicole doesn't speak any foreign languages