动词三单形式的变化规则有： 1）直接加s：give—gives,ask—asks,take—takes,get—gets,write—writes 2）s,x,sh,ch,o结尾的,加es：fix—fixes,pass—passes,watch—watches,wash—washes,go—goes3)以辅音字母+y结尾的,要把y变成i再加es：study—studies...