I will use the simple words and grammars to write these summaries.
how to use the word'and' ?
i found the lesson one is about two animals;a cat and a rat.
The cat and the rat. The cat and the rat ran.The rat ran at Ann,and the cat ran at rat.Can the cat catch the rat?
Yes,it can catch the rat.
the lad has a dog,Rab.Rab is not fat.Tom has a nag.The nag is fat.It is too fat to run fast.Can Rab catch the nag?
The lad has a dog and a cap.The dog has a cap.Can the lad catch the dog.
Do you know this birl ? it's an owl.
it can not see well by day,and can see best at night.
前52章的连词，大部分用的是and ，其次是 that, which,where,疑问词用的是do ,what ,how .时态 has run ,has come ,will let 现在完成时和一般将来时，及少量不定式的用法结构。
对于启蒙级的第一册来说，and和that，which，一般现在时，一般将来时，有必要完全掌握，并能用文章的简单词汇进行构造新的句型，为第二次打下良好的基础。
从几个方面分析
1、文章中的人物 动物 表示
2、动词和时态、及简单语法
由简单的元素逐渐构造出复杂，掌握基础是有必要的。