A cluster of CFE markers, as listed above, all contribute to an overall optimum situation for expressing hypothetical events, and the more CFE markers that are present in the sentence, the higher degree of hypotheticality implied, with counterfactuality being obtainable as an inference or implicature deriving from the highest level of hypotheticality (Comrie, 1986).
if Manila weren't so far away, i'd send him to study there.