?volunteered是一個(gè)動(dòng)詞，意思是自愿做某事，主動(dòng)提出幫助或參與某項(xiàng)活動(dòng)。它的發(fā)音為 [vlntrd]。

用法：

volunteered可以用作及物動(dòng)詞和不及物動(dòng)詞，常與to do搭配使用。作為及物動(dòng)詞時(shí)，后面通常跟著名詞或代詞作賓語；作為不及物動(dòng)詞時(shí)，后面通常跟著介詞短語或從句。

例句1-5句且中英對(duì)照：

1. She volunteered to help the elderly in her community. (她自愿幫助社區(qū)的老年人。)

2. He volunteered his time to teach English to underprivileged children. (他自愿花時(shí)間教貧困兒童英語。)

3. They have volunteered to clean up the park tomorrow. (他們自愿明天去清理公園。)

4. The organization is always looking for people who are willing to volunteer their skills and expertise. (該組織一直在尋找愿意志愿提供技能和專業(yè)知識(shí)的人。)

5. After the earthquake, many people volunteered to provide food and shelter for the victims. (地震發(fā)生后，許多人自愿提供食物和住所給受災(zāi)者。)

同義詞及用法：

1. Offer: 表示主動(dòng)提供幫助或參與某項(xiàng)活動(dòng)，常與to do搭配使用。：I offered to help him with his project. (我主動(dòng)提出幫助他的項(xiàng)目。)

2. Step forward: 表示挺身而出，主動(dòng)提供幫助或參與某項(xiàng)活動(dòng)。：Several people stepped forward to volunteer their time for the charity event. (有幾個(gè)人挺身而出，自愿為慈善活動(dòng)貢獻(xiàn)時(shí)間。)

3. Pitch in: 表示加入并一起做某事，通常指為了共同的目標(biāo)而合作。：Let's all pitch in and clean up the beach together. (讓我們一起加入，一起清理海灘。)

4. Lend a hand: 表示給予幫助或支持。：I can lend a hand if you need help with moving. (如果你需要搬家的幫助，我可以伸出援手。)

5. Contribute: 表示貢獻(xiàn)或捐贈(zèng)，常用于正式場合。：He contributed a large sum of money to the charity organization. (他向慈善組織捐贈(zèng)了一大筆錢。)