The news that only around half as many mainlanders are coming to the US to study now as before the pandemic seems a harbinger of worse to come.
【1】句子主干为:The news seems a harbinger of worse to come
【1】that only around half as many mainlanders are coming to the US to study now as before the pandemic 为连词that引导的同位语语从句,作主语the news的同位语。
以上句子整体语法结构分析如下:供网友参考
The news【主语】// that only around half as many mainlanders are coming to the US to study now as before the pandemic 【同位语】// seems【系动词】// a harbinger of worse【表语】// to come【后置定语】// .
备注(1):a harbinger of worse 中的worse为名词用法,意思是:更坏的消息/更快的事情/更快的情况。备注(2):to come不定式作后置定语修饰前面的名词短语a harbinger of worse。