This document discusses the doubling rule for forming the past tense of certain verbs in English. It provides examples of verbs that follow the doubling rule, such as hop becoming hopped when adding -ed to form the past tense. It also provides a table with examples of verbs in their present and past tense forms to demonstrate how the doubling rule is applied.

1. 1
Grammar 17 ­
Doubling rule

2. 2
A B C D E

3. 3
MKI LF G JH

4. 4
P QON R S

5. 5
YXWT ZVU

6. 6
A E I O U

7. 7
to clean
to make
to make
to draw
to bring
to live
to race
to hear
to smile
to wear

8. 8
Doubling rule
hop + ed = hopped

9. 9
Present - Past tense
bat
hop
pat
rip
nod
peg
Present Past+ed