一般现在时用法(共4页).doc
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1、精选优质文档-倾情为你奉上it 4一般现在时【概念引入】对于口腔保健,相信大家首先想到的就是每天必做的“刷牙运动”。但是除此以外,你还想到其他的口腔卫生习惯吗?看完下面这篇关于口腔清洁的短文,大家一定会更全面地了解口腔保健知识:A set of healthy teeth attracts people to your smile. Good oral hygiene helps us keep our teeth and mouth healthy. So work on these oral habits now:Brush your teeth at least twice a day,
2、 and spend at least 2 to 3 minutes brushing your teeth. Use a soft-bristle toothbrush that will not scratch your gums. Replace the toothbrush every 3 to 4 months.Floss your teeth once a day. Proper flossing removes the plaque that grows in between your teeth that brushing cannot reach. Flossing also
3、 improves blood circulation in the gums.Clean your tongue at least once a day. It only takes 10 to 15 seconds each time.Finally, visit your dentist once in every 6 months. He will clean your teeth more thoroughly so that your teeth will stay cleaner and last longer. Dental checkups can detect early
4、signs of oral health problems so that proper treatment can be given to prevent further damage to your teeth.【点睛】本文频繁地使用一般现在时来介绍“口腔清洁运动”。请注意上文中的句子:Brush your teeth at least twice a day.Replace the toothbrush every 3 to 4 months.Floss your teeth once a day.Clean your tongue at least once a day.Visit y
5、our dentist once in every 6 months.这些都是表示日常的重复活动,所以要用一般现在时态。【译文】当你微笑的时候,一口健康的牙齿会使你更加有魅力。良好的口腔卫生帮我们保持牙齿和口腔健康。所以,请养成下面这些口腔保健习惯吧!每天至少刷两次牙,每次至少刷两到三分钟。使用刷毛柔软且不会碰到牙龈的牙刷刷牙。记住,每隔三四个月换一次牙刷。每天用牙线清洁一遍你的牙齿。正确地使用牙线可以去除长在你牙缝中的牙斑,刷牙时刷不到这些牙斑。牙线还可以促进牙龈的血液循环。每天至少清洁一次舌头,一次10到15秒。最后,每隔半年看一次牙医。他会更加彻底地为你洗牙,这样你的牙齿将更加清洁,且能
6、保持更长时间。牙科检查能在早期观察到口腔问题的征兆,这样可以进行正确的治疗,防止牙齿受到进一步的伤害。【用法讲解】一、一般现在时的用法1. 表示经常发生的动作或存在的状态,常用频度副词sometimes, often, always, usually, seldom, every morning, twice a week等及时间副词every day / night / week / month / year, in the morning, in the afternoon, in the evening, at nigh等引导。例如: He often stays up late. 他常
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