写出下列单词的复数形式
city.cities 2.key.-keys 3.mouse.- mice 4.bus.- buses 5.English.- Engish 6.sheep.- sheep 7.tomato.- tomatoes 8.brush.- brushes 9.knife- knives
写出下列单词的单数形式
children.- child 2.butterflies.- butterfly 3.men.- man 4.leaves.- leaf 5.potatoes.- potato 6.feet.- foot 7.babies.- baby 8.glasses.- glass 9.Monkeys- monkey
写出下列单词的单数第三人称,过去式和现在分词形式
1.go.- goes - went - gone
2.write.-writes - wrote - writing
3.do.- does - did - doing
4.leave.- leaves - left - leaving
5.buy.- buys - bought - buying
6.stop.- stops - stopped - stopping
7.have.- has - had - having
8.Swim.- swims - swam - swimming
9.sing.- sings -sang - singing
10.know- knows - knew - knowing