offer的过去式是加ed还是双写r加ed?offered还是offerrd?
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offer的过去式是加ed还是双写r加ed?offered还是offerrd?offer的过去式是加ed还是双写r加ed?offered还是offerrd?offer的过去式是加ed还是双写r加ed?
offer的过去式是加ed还是双写r加ed?offered还是offerrd?
offer的过去式是加ed还是双写r加ed?
offered还是offerrd?
offer的过去式是加ed还是双写r加ed?offered还是offerrd?
offer重音在前面的o上,无须双写r,所以是offered
ed
直接加ed
当然是offered。