Unit1
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
Unit2
haveafever发烧haveasorethroat喉咙疼haveacold感冒haveatoothache牙疼haveaheadache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
Unit3
watch—watched看wash—washed洗clean—cleaned打扫play—played玩visit—visited看望do—didlastweekend上一个周末go—went去gotoapark—wenttoapark去公园goswimming—wentswimming去游泳gofishing—wentfishing去钓鱼read—read读gohiking—wenthiking去郊游
Unit4
leranChinese—learnedChinese学汉语singanddance—sanganddanced唱歌和跳舞eatgoodfood—ategoodfood吃好吃的食物takepictures—tookpictures照相climb—climbed爬have—hadbuypresents—boughtpresents买礼物rowaboat—rowedaboat划船seeelephant—sawelephant看大象goskiing—wentskiing去滑雪goice-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
参考资料：
