飞奔小蜗牛
幼苗
共回答了18个问题采纳率:88.9% 举报
undersea mountains(主语) generally form(谓语)
when volcanic mountains rise up from the seafloor but fail to reach the surface时间状语
while (those《those 指代volcanic mountains 》 that break the surface become islands.与上面的句子是并列
that是从句的主语 连接break the surface作定语修饰those,也就是火山; 然而冲破海平面的火山就成为了岛.
如果关系代词 that 和which 在定语从句中充当宾语时可以省略
1年前
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