(1)我們自己(used when the object of the verb or preposition is the same people，animals，things as the subject)(反身代詞)：We washed～and our clothes in the river.我們在河里洗澡、洗衣服。We saw～in the mirror.我們在鏡子中看到了自己。We took it upon～to tell you.我們認為有責任告訴你。
(2)我們親自，我們自己(used to emphasize，us or the names of the speaker and other people performing an action，etc)(強調(diào)，用以加強語氣，須重讀)：We～played no part in this.我們本身并沒有參與此事。We painted the room～.我們自己動手粉刷了房間。
by ourselves 1)單獨地：We travelled all by～.我們單獨旅行。2)靠我們自己，我們獨自地：We made the machine all by～.這機器是我們獨立制造的。