【正文】
b. past continuous perfect Grammar 3 – group work (Divide the class into three groups and each group find examples of a tense in Part 3 of the passage The Human Traffic Signal.) ? Find more examples of each tenses in Part 3 of the passage The Human Traffic Signal, nd put them on a piece of paper. Group 1 past simple Group 2 past perfect Group 3 past continuous Read Grammarpart 4 to part 6 on page 110111 Grammar 4 – practice (Do exercise 4 on page 14) ? Complete the passage in exercise 4 with the correct form of the verbs. Keys: (1) had done (2) was waiting (3) had seen (4) had asked (5) was crying (6) left (7) ran (8) was talking (9) had finished (10) did (11) knew (12) had happened (13) had fotten (14) took (15) had frozen Function 1 – Do exercise 1 on page 17 ? Complete the