6. John isn't tall. Tom is tall.

-->John isn't as tall as Tom.

7. My sister speak English quickly. You sister also speaks English quickly.

-->My sister speak English as quickly as your sister.

8. I don't cook well. My mother cooks well.

-->I don't cook as well as my mother.

9. His job is not difficult. My job is difficult.

-->His job isn't as difficult as mine.

10. He is tall. His father is also tall.

-->He is as tall as his father.

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@Zịt

`\text{6. Tom is taller than John. }`

`\text{7. My sister speak English as quickly as your sister. }`

`\text{8. My mother cooks better than me. }`

`\text{9. My job is more difficult than his job.}`

`\text{10. He is as tall as his father.}`