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

go swimming—went swimming去游泳

go fishing—went fishing去钓鱼

read—read 读

go hiking—went hiking 去郊游

Unit 4：learn Chinese—learned Chine