"At times" can be interpreted either as 1. an adverbial expression ("at times I feel good"), or 2. preposition + noun ("he likes to dance at times like this") "Sometimes" is an adverbial expression that means the same as "at times" or "at some times". If you want to use "sometimes" as a noun, it is best to tear it apart into two words: "There are some times when he likes to dance." If you feel poetic, you might (or might not) get away with using "sometimes" as a noun: "There are special sometimes when I like to dance".

The difference between "at times" and "sometimes" lies primarily in their tone and usage: 1. **"Sometimes"**: - **Usage**: It is more commonly used in everyday conversation and can fit into both formal and informal contexts. - **Tone**: Neutral and versatile. - **Examples**: "Sometimes I go for a walk in the evening." "I sometimes forget to call back." 2. **"At times"**: - **Usage**: It is often used in more formal or written contexts. It can add a touch of emphasis or formality to the statement. - **Tone**: Slightly more formal or reflective. - **Examples**: "At times, the project can be overwhelming." "At times, I reflect on past decisions." In summary, "sometimes" is more versatile and commonly used, while "at times" is generally reserved for more formal contexts and can convey a bit more emphasis.

In English "sometimes" and "at times" are largely interchangeable, "sometimes" is more commonly used in casual speech, and "at times" can add a slight emphasis or formality. "Sometimes" can be usually placed at start, middle or end: "Sometimes I listen to music" or "I sometimes listen to music" or "I listen to music sometimes" are all okay. "At times" is mainly used in a formal setting: "At times, the workload is overwhelming" So generally just stick with "sometimes", it is a more general term and used in general conversation.