Using Since, For, While, As, By the Time, Until, Till and As Soon As Since; means “from that time”. Example; I have been studying English since 2010. For; We commonly use the present perfect and present perfect continuous with since. Example; Sam has helped me for six hours. Follow the list other expressions and examples;
Detailed Time Clauses Chart Time clauses; if, as soon as, before, after, until/till, while, when, unless. Follow the list for examples about these words;
Uses and Differences – ‘For’, ‘During’, ‘While’ For Usage; We use for + a period of time to say how long something goes on.
Concessive Contrast Contrast words and examples sentences; although, though, even though, while, nevertheless, all the same, in spite of, despite, notwithstanding, whilst and etc…