He set a precedent.

'That' subclauses are sometimes preceded by commas.

If we allow Mary to wear spaghetti straps to the dance, it will set a precedent for the rest of her teenage years.

The Canadian government’s guide to writing says that the role of punctuation is to clarify, and "this principle takes precedence over all precepts governing the use of individual marks of punctuation."

The precedent has been set.

It is very natural for a human being that one always give himself precedence over the interests of others.

H" is not pronounced in Spanish unless it is preceded by "c."

In politics, one is preceded by imbeciles and replaced by morons.

It's totally without precedent for the suspect's attorney to be the true culprit.

The mind’s thoughts precede actions, guide them and make them. For someone, therefore, who speaks or acts with evil mind, suffering ensues, just as a cartwheel follows the path of the draft-ox.