was playing是过去式还是将来,如果是过为何是加ing而不是加ed?

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wasplaying是过去式还是将来,如果是过为何是加ing而不是加ed?wasplaying是过去式还是将来,如果是过为何是加ing而不是加ed?wasplaying是过去式还是将来,如果是过为何是

was playing是过去式还是将来,如果是过为何是加ing而不是加ed?
was playing是过去式还是将来,如果是过为何是加ing而不是加ed?

was playing是过去式还是将来,如果是过为何是加ing而不是加ed?
确切说应该是过去进行时,过去式 是played,将来时是is playing,或者will play,is going to play等等

was playing是过去进行时

was doing 是过去进行时