精选优质文档-倾情为你奉上英语六大时态关键词列表时态动词形式关键词例句一般现在时do/does1. every Peter goes to school every day.2. always/usually/often/sometimes/seldom/neverSally never sleeps late.3. in the morning/eveningI usually go for a walk in the morning.4. on SundayWe have no class on Sunday.5. in spring/autumn/It often snows in winter in Beijing.6. once a weekMy friend Sam watches a fim once a week.现在进行时am/ is are doing1. nowRoger is dancing now.2. at presentP