2019学年度人教版选修七Unit4SharingPeriod2Language points--word study课件(44张)
2019学年度人教版选修七Unit4SharingPeriod2Language points--word study课件(44张)第5页

[归纳总结]

voluntary adj. 自愿的;志愿的;义务的 voluntarily adv. 自愿地;主动地;义务地 volunteer to do sth.自愿做某事 volunteer for sth. 自愿做某事 volunteer forces 志愿军 volunteer to join the army 自愿参军