句末有by now用什么时态

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句末有bynow用什么时态句末有bynow用什么时态句末有bynow用什么时态用完成时态!例如:Itisthebiggestdonationwehavereceivedbynow.现在完成时.have

句末有by now用什么时态
句末有by now用什么时态

句末有by now用什么时态
用完成时态!
例如:
It is the biggest donation we have received by now.

现在完成时.
have+done结构