February is the coldest month in North America. (make it positive)

• Superlative: February is the coldest month in North America.
• Positive: No other month in North America is as cold as February.

• The + superlative যুক্ত বাক্যকে positive করার নিয়ম-
- No other + Superlative degree এর পরের অংশ + Verb + as/so + Superlative degree এর Positive form + as + প্রদত্ত Sentence এর Subject.

- সুতরাং নিয়মানুযায়ী সঠিক উত্তর -
- No other month in North America is as cold as February.

• More Example:
- Superlative: Pride is the greatest vice.
- Positive: No other vice is as great as pride.

• অন্যদিকে,
• One of the যুক্ত superlative বাক্যকে positive করার নিয়ম-
- Very few + positive degree এর পরের Plural Noun + Plural Verb + as/so + Superlative degree এর Positive form + as + Subject of Positive Degree.

• Example:
- Superlative Degree: Shakespeare is one of the greatest writers.
- Positive Degree: Very few writers are as great as Shakespeare.

Source: Advanced Learner's Grammar and Composition by Chowdhury and Hossain.