Since
The conjunction since, which originally meant ‘from the time that’, is used in a
temporal sense. However, since events described in temporal relation often also
have a causal relation, that is, the first event causes the second (as in 2), and since
speakers and addressees are usually less interested in pure temporal sequence and
more interested in causes, a causal inference becomes conventionalized as part of
the meaning of since. As a result, a sentence such as (2) can have either or both
interpretations. In fact, the previously inferred sense can even become independent,
leading to sentences such as (3), which has a purely causal interpretation.
1.I have done quite a bit of writing since we last met temporal
1.John has been very miserable since Susan left him temporal/causal
- I’ll have to go alone since you’re not coming with me causal