6、forsth / doing sth 表示"志愿/自动申请某事;志愿/自动申请做某事"。 volunteer to do sth 表示"自愿/义务/无偿做某事"。☞Theyneedsomevolunteerstohelppaintthehouse.他们需要几个自愿帮助漆房屋的人。【跟踪典例】①Thegirlworkedasa________________(教师志愿者)inthemountainousareaforthreeyears.②Nowlet’srecitethepoemwelearnedlastweek.Any______