以下句子中的“have greatly improved”的时态是现在完成时吗?如果原型是什么呢?
以下句子中的“have greatly improved”的时态是现在完成时吗?如果原型是什么呢?
today,deaf people are able to use a special display telephone to communicate.the quality and speed of telephone communications have greatly improved.bell's invention has paved the way for the internet.
today,deaf people are able to use a special display telephone to communicate.the quality and speed of telephone communications have greatly improved.bell's invention has paved the way for the internet.
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1年前1个回答
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has indeed greatly improved这句话.
1年前1个回答
你能帮帮他们吗
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