分析其句子成分?Until now scientists had very little clear evidence
分析其句子成分?
Until now scientists had very little clear evidence about the drug's role in preventing more serious effects of infection.
“about drug's role”是不是介词短语作补语?“in preventing more serious effects of infection”是什么?
effect在这里是什么意思？
Until now scientists had very little clear evidence about the drug's role in preventing more serious effects of infection.
“about drug's role”是不是介词短语作补语?“in preventing more serious effects of infection”是什么?
effect在这里是什么意思？
赞 苍然凌雪 春芽
共回答了19个问题采纳率：94.7% 举报
至到最近,科学家对于这种药物在阻止感染的严重后果（方面）的作用只掌握很少的明确证据.
主语 scientists
谓语 had
宾语 very little clear evidence about the drug's role
宾语补足语 in preventing more serious effects of infection（个人感觉 你再查查）
状语 Until now
effect 就是后果 效果 作用的意思
如side effect 专指药物的副作用
句子成分以把句意弄懂为主 不必太苛求语法上的称谓
总之
about the drug's role in preventing more serious effects of infection 都是对 evidence 的补充说明
主语 scientists
谓语 had
宾语 very little clear evidence about the drug's role
宾语补足语 in preventing more serious effects of infection（个人感觉 你再查查）
状语 Until now
effect 就是后果 效果 作用的意思
如side effect 专指药物的副作用
句子成分以把句意弄懂为主 不必太苛求语法上的称谓
总之
about the drug's role in preventing more serious effects of infection 都是对 evidence 的补充说明
1年前
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你能帮帮他们吗