The phrase "has ban the sale of" is incorrect.
When using "has" (present perfect tense), the main verb must be in the past participle form.
The past participle of "ban" is "banned."
So the sentence should be:
"The Government has banned the sale of tobacco."
Explanation:
- "Has" is an auxiliary (helping) verb.
- The verb following it must be in past participle form:
- Correct: has eaten, has spoken, has banned
- Incorrect: has eat, has speak, has ban