0 at or during a time earlier than (the thing mentioned): --
I feel as though I've been here before.
He said he had never seen her before.
She had to give the doorman a tip before he would help her with her suitcases (= he would not do it until she had given him a tip).
Before we make a decision, does anyone want to say anything else?
She's always up before dawn.
Before leaving he said goodbye to each of them.
1 in front of: --
2 at or during a time earlier than (the thing mentioned): --
3 in front of: --
Controls were asked about food and restaurant exposures for the week before the matched patient's illness, using the same questionnaire format as for cases.
Further research is clearly needed on the processes of party list construction before we have an answer to this question.
Political fund regulation should be legislated before other political reform.
The problem needs to be addressed before the situation becomes as serious as it is with other, more broadspectrum anthelmintics.
A research bias favouring certain helminth groups over others has been suspected before.
Rats were prohibited food and water for 12 h before infection.
Indeed, we have seen in the previous subsection that setoids and morphisms of setoids must come before and be the base of category theory.
Also, before resistance starts to appear in human isolates of fluke.