三十八、动词的-ing形式
go—going do—doing walk—walking jump—jumping climb—climbing play—playing teach—teaching catch—catching watch—watching read—reading cook—cooking clean—cleaning answer—answering listen—listening collect—collecting
count—counting run—running swim—swimming have—having live—living make—making take—taking use—using dive—diving write—writing ride—riding
三十九、动词的过去式
watch—watched wash—washed clean—cleaned play—played visit—visited learn—learned
climb—climbed row—rowed dance—danced do—did go—went sing—sang
eat—ate take—took have—had see—saw buy—bought read—read catch---- caught teach---taught
四十、形容词的比较级
tall—taller short—shorter old—older young—younger small—smaller long—longer strong—stronger big—bigger thin—thinner heavy—heavier 四十一、疑问词
what(什么) which(哪一个) when(什么时候) where(在哪里) why(为什么) how(怎样，如何) how many(多少) how much(多少钱) what about……（……怎么样）
how often(多久一次) how long(多长时间) how soon (多久以后)
四十二、单词的缩写
I’m = I am it’s = it is he’s = he is she’s = she is
that’s = that is who’s = who is what’s = what is they’re = they are isn’t = is not aren’t = are not can’t = cannot don’t = do not doesn’t = does not let’s = let us