我来帮你整理归纳一下:
(1)元音前面要家(an)注:上册书后面有因素。
(2)结尾是0的后面要加es列如:mangoes也有特殊的情况比如说beach
U1
simple present tense
simple present tense of the verb"to be"
simple present tense of the verb"to do"
U2
personal pronouns(subject form)
personal pronouns(object form)
U3
prepositions of time
asking "Wh-"questions
using "some"/"any"
http://www.pep.com.cn/ce/czyy/qnjs/czyy/
上面是人教版教材的网址,那里,你可以看到电子版的课本。
至于语法,课本上肯定也会很清楚了