Activity: Puzzle Out the Puzzle! To check your understanding of the lesson, accomplish the puzzle with the appropriate words to complete the thoughts or ideas being established in each number. ACROSS: 1. It denotes an action occurred at a certain time in the past. 3. Form of verbs that does not have the same pattern from base to past participle 5. Past indicates an action which happened first before another action occurred. DOWN: 1. Past of the verb is used when constructing the past perfect tense. 2. They show the time of an action, event or situation by changing the form of verbs. 4. Form of verbs that has the same pattern from base to past participle. 1 2 3 5