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：['mætə] 事情，麻烦 sore：[sɔ:]疼的 hurt ：[hə:t]疼痛
nose：[nəuz] 鼻子
tired：['taiəd] 疲劳的，累的 excited：[ik'saitid] 兴奋的 angry：['æŋgri] 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：[wɔʃ] 洗 clean → cleaned：[kli:n] 打扫 play → played：[plei] 玩 visit → visited：['vizit] 看望 read → read 读
do → did last weekend 上一个周末 go → went 去
go to a park → went to a park 去公园 go swimming → went swimming 去游泳 go fishing → went fishing 去钓鱼 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 a boat → rowed a boat 划船 see elephant → saw elephant 看大象 go skiing → went skiing 去滑雪 go ice-skating → went ice-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
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