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Up into the blue sky did the bird fly Up into the blue sky the bird flew Up into the blue sky flew the bird Flew up into the blue sky the bird
were，will were，would was，would have was，were going to
will fly fly would fly flew
was; would am; will will be; will were; would
keep kept keeping to keep
keep kept keeping to keep
Up into the blue sky did the bird fly Up into the blue sky flew the bird Up into the blue sky the bird flew Flew up into the blue sky the bird
Up into the blue sky did the bird fly Up into the blue sky the bird flew Up into the blue sky flew the bird Flew up into the blue sky the bird
keep kept keeping to keep
did the bird fly flew the bird the bird flew had the bird flown
Up into the blue sky flew the bird Up into the blue sky did the bird fly Up into the blue sky the bird flew Flew up into the blue sky the bird
did the bird fly flew the bird the bird flew had the bird flown
Up into the blue sky did the bird fly Up into the blue sky the bird flew Up into the blue sky flew the bird Flew up into the blue sky the bird
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