Unit 1：
tall—taller 更高的      short—shorter 更矮的      strong—stronger 更强壮的      old—older 年龄更大的      young—younger 更年轻的      big—bigger 更大的heavy—heavier 更重的      long—longer 更长的      thin—thinner 更瘦的   small—smaller (体型)更小的

Unit 2：
have a fever 发烧      have a sore throat 喉咙疼      have a cold 感冒      have a toothache 牙疼      have a headache 头疼      matter 事情，麻烦      sore 疼的      hurt 疼痛      nose 鼻子      tired 疲劳的，累的      excited兴奋的      angry 生气的      happy 高兴的      bored 无聊的，烦人的      sad 忧伤的，悲伤的

Unit 3：
watch—watched 看      wash—washed 洗      clean—cleaned 打扫      play—played 玩      visit—visited 看望      do—did      last weekend 上一个周末      go—went 去      go to a park—went to a park 去公园      goswimming—went swimming 去游泳      go fishing—went fishing 去钓鱼      read—read 读      go hiking—went hiking 去郊游

Unit 4：
leran Chinese—learned Chinese学汉语      sing and dance—sang and danced 唱歌和跳舞      eat good food—ate good food吃好吃的食物      take pictures—took pictures 照相      climb—climbed 爬      have—had buy presents—bought presents买礼物      row aboat—rowed a boat 划船      see elephant—saw elephant 看大象      go skiing—went skiing 去滑雪      go ice-skating—wentice-skating 去滑冰      how怎么，如何      get—got 到达      last上一个的，仅余的，留在最后的