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takes; to work on spends; working on took; to work on spent; working on
needn't have seen must have seen might have seen can't have seen
finish to finish finishes finishing
needn' l have seen must have seen might have seen can' t have seen
needn’t have seen must have seen shouldn’t have seen can’t have seen
finish to finish finishes finishing
to read, written read, written r
read, written to read, written reading, are written to read, are written
strengthen… illness strength…illness strength…ill strengthen…ill
two weeks ago since two weeks for two weeks before two weeks
the shoemaker lost her shoes the shoemaker gave her two left shoes Mrs. Green took away her shoes she couldn't find her shoes
two weeks ago. last January. on her 92nd birthday. three months ago.
needn't have seen must have seen might have seen can' t have seen
to finish finishing finish finishes
read to read reading to reading
finish to finish finishes finishing
finish to finish finishes Finishing
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