Correct these sentences. Write their correct full variants:

1. My sister is the youngest than me.

2. The weather will be the nicest today than yesterday.

3. I want to buy a faste car than I have now.

1. My sister is the youngest than me. Corrected sentence: My sister is younger than me. Explanation: The word "youngest" is a superlative form, indicating that something is at the highest level of comparison. However, when comparing two people or things, we use the comparative form of the adjective. In this case, the correct form is "younger" because we are comparing the age of the speaker and the sister. 2. The weather will be the nicest today than yesterday. Corrected sentence: The weather will be nicer today than yesterday. Explanation: Similar to the first sentence, we need to use the comparative form of the adjective "nice" when comparing two things. The correct form is "nicer" because we are comparing the weather today and the weather yesterday. 3. I want to buy a faste car than I have now. Corrected sentence: I want to buy a faster car than the one I have now. Explanation: In this sentence, we need to use the comparative form of the adjective "fast." Additionally, we need to use the pronoun "one" to refer back to the car being mentioned. The correct form is "faster" and "one I have now" instead of "faste" and "than I have now" respectively. Step-by-step solution: To correct these sentences, follow these steps: 1. Identify the incorrect form of the adjective in each sentence. 2. Determine whether a comparative or superlative form is needed based on the context. 3. Replace the incorrect form with the correct comparative form. 4. Ensure that the sentence structure is correct, such as using pronouns correctly for comparison. 5. Double-check that the corrected sentence makes sense and is grammatically accurate. Remember to read and re-read the corrected sentences to ensure they convey the intended meaning and are free of grammatical errors.