什么是 “be helpful in doing sth”？
“Be helpful in doing something” 是一个常见的英语表达结构，用于说明某事或某人在完成某个动作时起到了积极作用或提供了帮助。
例句：Reading English articles is helpful in improving your vocabulary.
常见用法解析
- 主语 + be + helpful + in + 动名词（doing）：强调某事物对完成某项活动有帮助。
- “Helpful” 在这里作表语，表示“有益的”、“有帮助的”。
- 介词 “in” 后必须接动名词（即动词+ing形式）。
更多实用例句
- Regular exercise is helpful in reducing stress.
- Her advice was very helpful in solving the problem.
- Using flashcards can be helpful in memorizing new words.
- This app is helpful in organizing your daily tasks.
常见错误提醒
❌ 错误：This book is helpful to learn English.
✅ 正确：This book is helpful in learning English.
注意：不要混淆 “helpful in doing” 和 “help to do / help do”。前者强调“对……有帮助”，后者表示“帮忙做……”。
小练习（自测）
试着用 “be helpful in doing sth” 改写以下句子：
- Listening to podcasts helps you understand native speakers.
- Practicing every day helps improve your speaking skills.
答案可在心里默念，也可以写下来巩固记忆哦！