Adverbs of frequency
(a) always, continually, frequently, occasionally, often, once, twice, periodically, repeatedly, sometimes, usually etc. (b) ever, hardly ever, never, rarely, scarcely ever, seldom A. Adverbs in both the above groups are normally placed: 1. After the simple tenses of to be: He is always in time for meals. 2. Before the simple tenses of all other [...]
