2、doing的结构表达做事方式。by介词,表示“通过……方法或途径”,译成“靠、通过”。by后面可以加名词或动名词短语。3.动名词的构成:动词后加动名词doing,相当于名词,在句子中可以做主语、宾语、表语定语等。SectionA1(1a-2d)Step1WarmingupT:HowdoyoustudyEnglish?DoyoustudyEnglishbythefollowingways?(Showsomepicturesandpresenttheimportantphrases.)T:HowdoyoustudyEnglish? S