1) (стр. 273) назовите форму множественного числа: house, mouse, potato, piano, dish, baby, valley, knife, thief, roof, cliff, woman, tooth, child, box, ox, sheep, brother-in-law. 2) назовите форму единственного числа: heroes, kisses, flies, donkeys, loaves, feet, deer, men-of-war, sisters-in-law.
1) houses, mice, potatoes, pianos, dishes, babies, valleys, knives, thieves, roofs, cliffs, boxes, oxes, sheep, brothers-in-law.
2) hero, kiss, fly, donkey, loaf, foot, deer, man-of-war, sister-in-law.