We had to store all this while we were away. 我们不在家时，得把所有的一切都收藏起来。如：
After harvest we store the grain.收割后我们把粮食存起来。
如：He was out of work, he had saved no money before. 他失业了，以前也没有攒下钱。
They are saving for a house. 他们正在存钱买房。
如：I have kept the old letters all the time. 我一直把这些旧信保存了下来。
Will you keep the papers for me? 你能为我保存这些论文吗？
A board stands by the house on which were written “keep off”.
At night they made a fire to keep wild animals off.
keep one’s word
该动宾词组意为“守信”，“遵守诺言”。词组里word不能用复数形式words.同义词组为“keep a promise”,反义词组为“break one’s word”。如：
Once you promise someone to do something,you should keep your word.
keep sb.healthy 使……保持健康
①I was so tired that I could hardly keep myself awake.
②I’m sorry to have kept you waiting so long.
③Keep your mouth shut and your eyes open.
④They kept us out.
⑤Once a cold kept him in bed for three days.
①keep sth.up 使不低落，遵守
如：Even if we fail we should keep up our spirits.
②keep sb.up 使晚睡
如：It’s wrong to keep the children up so late.
③keep up with sb. 赶上，不落后，保持联系
如：I still keep up with my college classmates far away. 我仍与远方的大学同学保持着联系。
go down on one’s knees 双膝跪地 go down on one knee 单膝跪地
如：①The son went down on his knees, begging his father for mercy.
②Some football players celebrate their“goal”by going down on one knee.
①The wall is so hard I can’t knock nails into it.
②He was reading while he eas walking and knocked into a tree.