dictionnaire Français-Anglais »

si + imperfect signifie anglais

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si + imperfect adverbe

what about(used to make a suggestion)
adverb

comme si (+ imperfect or pluperfect) conjunction

as though◼◼◼(as to suggest that)
conjunction
[UK: əz ðəʊ] [US: ˈæz ˈðoʊ]