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Synonym Posted 15 years ago
Grammar

Passed

What is the difference between 'passed on' and 'passed by' please let me know when to use what.

for eg.

Four months have passed by/on since I lost my puppy.
  

Top answer

pass by means to go past or near smth. com/pass+by or to overlook or disregard something to pass by difficult problems And it shuld be noted that pass by is usually means the same as pass So that you should write Four months have passed (by) since... Five years passed (by) ...

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3 Answers
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pass by means to go past or near smth. on your way to another place

A black limousine passed by when she looked out the window
The example is taken from the http://www.thefreedictionary.com/pass+by

or to overlook or disregard something
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Thanks Mr. Skif,

So does that mean when we are talking about time only 'passed by' should be used and not 'passed on'?
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It is very interesting question as 'talking about time' can be interpreted in different ways.

It can be said that someone passed on to mean that they died:

He passed on in 1978
So that pass on can be used when we are talking about time...

But as for your first post(to tell how much time passed by) we can say that only pass by should be