Past Simple:
●She walked to the park yesterday.
●They watched a movie last night.
●He visited his grandparents last weekend.
Subject + past simple verb + (rest of the sentence)
Past Perfect: had + participle
●By the time I arrived, she had already left.
●They had finished their homework before dinner.
●I realized I had forgotten my keys when I reached the front door.
Subject + "had" + past participle verb + (rest of the sentence)
Past Continuous: was/were
●I was studying when the phone rang.
●She was cooking dinner while he was reading a book.
●They were playing in the garden when it started raining.
Subject + "was" (for singular) or "were" (for plural) + base verb + "ing" + (rest of the
sentence)
Modal Verb: should/must
●I can swim.
●You should eat your vegetables.
●She must finish her assignment.
Subject + modal verb + base verb + (rest of the sentence)
