In Vietnamese grammar, Adverbs of Time are used to express when or how often an action happens. They offer essential contextual information within a sentence. Unlike English, Vietnamese adverbs of time often occur at the beginning or the end of the sentence. Examples of these adverbs are ‘hôm nay’ (today), ‘hôm qua’ (yesterday), ‘ngay’ (immediately), ‘giờ này’ (this time), etc.