To jog in the morning is a good sport for you. To ...

问题

To jog in the morning is a good sport for you.
To jog in the morning is good for you.
To jog is a sport.
以上三句话有语法错误吗？

思考

Analyzing sentence structure

The user asks if three sentences are grammatically correct. The first sentence “To jog in the morning is a good sport for you” is grammatically fine, but the phrase "a good sport" is awkward here, as it’s typically used to describe a person, not an activity. A more natural version would be “Jogging in the morning is good exercise for you” or "Good for you."

Reviewing sentence structure

For Sentence 2, “To jog in the morning is good for you” is grammatically correct, but more natural would be: “Jogging in the morning is good for you.” Using a gerund is more idiomatic than an infinitive in modern English.

Sentence 3, “To jog is a sport” is also grammatically fine but unnatural. “Jogging is a form of exercise” would be more accurate—jogging isn't typically considered a sport, but rather a physical activity. Plain "sport" is typically countable; “exercise” works better here.

Reviewing sentences and structure

"Go jogging" vs "jog": "Go jogging" is a more natural phrase than just "jog" when referring to the activity. No need for "morning jogging," instead use "jogging in the morning" for clearer expression.
"Sport" as countable/uncountable: “Sport” is countable in phrases like "Soccer is a sport," but uncountable in British English ("I like sport"), while American English uses "sports

Thought for 16s

回答

简短结论：

第1句不自然（用词问题）。
第2句语法对，但更常用动名词。
第3句语法形式没错，但用词不当。

具体说明：

To jog in the morning is a good sport for you.
语法结构没错，但英语里很少把 jogging 说成 a sport。而且 a good sport 通常指“很有风度的人”。建议改为：

Jogging in the morning is good for you.
Jogging in the morning is good exercise.
Going for a morning jog is good for you.

To jog in the morning is good for you.
语法正确，不过主语用不定式（to jog）偏书面/不自然，日常更常用动名词：

✅ Jogging in the morning is good for you.

To jog is a sport.
形式上可行，但语义不地道。一般不把 jogging 归为 a sport；更自然说它是锻炼/运动形式：

✅ Jogging is (good) exercise. / Jogging is a form of exercise.
如果一定要用 sport，通常说：
Running is a sport.（跑步可被视为一项竞技性运动）

小结：把三句统一、自然地表达，可写：“Jogging in the morning is good exercise.”

问题

To run is a sport.
这句呢？

思考

Evaluating sentence structure

The phrase "To run is a sport" feels awkward in English because of using the infinitive as the subject. A more natural way to say it would be "Running is a sport." This fits better, as "running" is a gerund here. Depending on context, though, both can be correct, especially in phrases related to competitive athletics.

Clarifying precision in language

While running can certainly be a physical activity or exercise, calling it a "sport" often implies competition. "Running is a sport" works, but for clarity, "Competitive running" or "Track and field" would be more precise. In American English, "Running is a sport" is typically fine, but British English tends to treat "sport" as uncountable.

nuances of running as a sport

"Running is good exercise" works well, but "To run is a sport" feels odd. Semantically, "To run" isn’t wrong, but "Running is a sport" is much more natural. It can be accepted in both American and British English, though "Running is a form of sport" is less common and a bit redundant.

Crafting concise feedback in Chinese

答复可以从“不太自然。”开始，然后解释：

语法上没问题（不定式作主语），但是在英语里描述活动时一般使用动名词：“Running is a sport”更自然。
如果强调竞技性质，“Competitive running is a sport”或“Track and field is a sport”会更准确。英国英语中，“Athletics is a sport”同样合适。

Thought for 21s

回答

不太自然。

语法上成立（不定式作主语），但这种场合英语更常用动名词：
✅ Running is a sport.
如果想强调“竞技项目”，更精确：
✅ Competitive running is a sport. / Track and field is a sport.（英式常说 Athletics is a sport.）
若只想说“日常锻炼”，别用 sport：
✅ Running is good exercise. / Running is a form of exercise.

（顺带：别写 a good sport，那通常指“很有风度的人”。）

问题

思考