Answered By: Writing Center Last Updated: Nov 05, 2015 Views: 1
When we use see somebody do something, it means the speaker sees the complete action from beginning to end.
e.g.: Did you see the accident happen?
When we use see somebody doing something, it means the speaker sees the person was in the middle of doing something, not necessary sees the complete action.
e.g.: I saw him walking along the street.
These two structures can also be used with hear, smell, etc.
e.g.: Can you smell something burning?
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