Mexico
tiger
sierraleone
P39.一：
betterbesthavierheaviset moremostolderoldest biggerbiggestmoreexpensivemostexpensive moresmartmostsmartbetterknownbestknown morebadlymostbadlylessleas morecarefullymostcarefullyfewerfewest moreslowymostslowythinnerthinnest morehealthymosthealthymoreeasilymosteasily hotterhoyyestofteneroftenest farerfarestlargerlargest
p43
动词过去式过去分词
bewasbeen
cookcookedcooked
knowknewknown
swimswanswam
getgotgot
teachtoughttaught
leaveleftleft
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