摘要：2．as 引导的非限制性定语从句与it引导的句子. The earth is round, and it is known to all. The earth is round, which is known to all. As is known to all, the earth is round. It is known to all that the earth is round. as 具有“正如 之意.搭配的动词一般是固定的.如:as you know/ as you see/ as we planned/ as we expected/ as is reported...

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