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關於v.的單三形式: ○1通常在動詞後加s.如work→works ○2以s,x,ch,sh結尾的動詞加es.如teach→teaches ○3以輔音字母加y結尾的動詞,變y為i,再加es.如study→studies ○4以o結尾的動詞加es.如go→goes ○5 have→has
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