看图练语法：Student's Book

Welcome!
1  Yes/No questions
2  Wh-questions
3  The past:What happened?
   The present perfect;What has happened?
4  The past continuous:What was happening
   The Present perfect continuous:What has been happening?
5  Past,present,and future
6  Quantity
7  Articles-l
8  Articles-ll
9  Comparison
10  Requests and obigation
11  Ability
12  Advice and suggestions
13  Doing or to do?
14  Doing or to do?
15  prepositions
16  Prepositions
17  The furure
18  Possibility and probability
19  Verbs+Prepositions
20  Phrasal verbs
21  If…sentences
22  If…sentences
……