unit 16: B4-5-R

a. Don’t throw trash on the street. b. Keep off the grass. c. Collect bottles and cans. d. Don’t damage trees. e. Save water. f. Collect paper. g. Don’t throw trash in the country. h. Don’t pick flowers. 1 2 3 4 5 6 7 8 Keys 1 2 3 4 5 6 7 8 c. Collect bottles and cans. h. Don’t pick flowers. b. Keep off the grass. f. Collect paper. g. Don’t throw trash in the country. d. Don’t damage trees. e. Save water. a. Don’t throw trash on the street. Section: B4 - 5 – B 6 UNIT 16: MAN AND THE ENVIRONMENT Model sentence *Model verb “should” Ex1: We should do homework. S + should + infinitive (not to) Ex2: We should not throw trash on the street. S + should not + infinitive (not to) should not = shouldn’t We should not leave trash. We should collect paper. We should save water. We should not damage tree. We should collect cans and bottles. . Don’t damage trees. e. Save water. a. Don’t throw trash on the street. Section: B4 - 5 – B 6 UNIT 16: MAN AND THE ENVIRONMENT Model sentence *Model verb “should” Ex1: We should do homework. S