Lucy comes from America and Lily comes from America,too.Lucy

Lucy comes from America and Lily comes from America,too.
Lucy来自美国,Lily也来自美国.
下面一句是简写,意思与上句一样.
Lucy comes from America.(So) (does) Lily.
Lucy来自美国,Lily也是.
“so do + 人名或人称代词”,意思是：某某也一样.这里Lily是第三人成单数,所以要用does.
再举一例：
My mom likes swimming,so do I.意思是：我妈妈喜欢游泳,我也是.