The document defines the simple past tense, which indicates an activity or situation that began and ended at a particular time in the past. It provides the formulas for constructing sentences in the simple past tense, including positive sentences using subject + verb 2 + object, negative sentences using subject + did not + verb 1 + object, and interrogative sentences using did + subject + verb 1 + object.

2. Definition :
The simple past indicates that an
activity or situation began and
ended at a particular time in the
past.

3. Formula
Verbal
Positive :
S + V2 + Object
Negative :
S + did not + V1 + Object
Interrogative :
Did + S + V1 + Object