Developing cohesion
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Ellipsis | page 9 of 11 |
Quasi-ellipsis with do
To avoid repeating a verb group 
, it is common (more so in speech than in
writing) to use do (or one of its forms):
"I hope you know what you're doing."
He laughed, tossing back his head.
"I hope I do, too, my beloved. I sincerely hope I do." (Bank of English)
Many such uses of do occur in sentences where comparisons are being made:
This woman says she has to work much harder than she did under the Communist government. (Bank of English)
For further information about this, see 
page 7 of this file.
Quasi-ellipsis with do
