范文点评：
1.开篇简要描述话语的含义，同时结合话语的含义引出文章的论点：应把握好自己的过去、现在和将来。
2.自然过渡，用疑问的方式提出如何把握好自己的过去、现在和将来，紧扣作文话题。
3.第三段首句提纲挈领，明确说明“抓住每一天”就会把握好自己的过去、现在和将来。
4.分三个层次论证了自己的观点，论据充分，论证有力。
5.末句总结全文，再次强调了论点。
句法点评：
1. The remark means that every day is closely related to another, for yesterday leaves us valuable experience that we can take advantage of for today and tomorrow; today is the time that we learn from yesterday and experience new life, making good preparations for tomorrow; tomorrow is the future that we are eager to experience based on yesterday and today.
本句是一个较复杂的句子，that引导的从句有宾语从句that every day is closely related to another，有定语从句 that we can take advantage of for today and tomorrow 和 that we are eager to experience。也有同位语从句 that we learn from yesterday and experience new life,同时还用到了现在分词短语making good preparations和过去分词短语based on yesterday and today，句式结构复杂多样。
2. Seize every day and you’ll make the past, present and future days worthwhile.
本句为“祈使句+ and +陈述句”的结构，其中的祈使句的功能相当于条件状语从句，如本句可以转化为If you seize every day, you’ll make the past, present and future days worthwhile。

范文点评：
1.开篇简要描述给定话语的含义。
2.第二段首句自然过渡，引出生活的多变，紧扣作文话题。
3.对比论证，论述生活虽多变但却让人在克服困难的过程中变得坚强。
4.末段首句以疑问的句式提出如何应对多变的生活，自然过渡。
5.论述以积极的态度应对生活。
句法点评：
1. Many successful people accept the fact that life is short and full of uncertainties.
此句有了that引导的同位语从句，从句解释fact的具体含义。
2. Flowers bloom and fade; life has ups and downs.
采用形象的描写，使表达更加生动。