推荐回答（3个）
lassen有两种意思。一种是实义，一种是助动词。
1、作为实意动词
1. 停止，不做，放弃
Lass das doch!
别做了！
Er raucht nicht mehr, weil er das Rauchen schon vor einem Jahr gelassen hat.
他不再吸烟了，因为他一年前已经戒烟了。
2. 放出，放进
Komm, Jürgen, lass die Luft aus den Ballons!
来，Jürgen，放掉气球里的气！
Maria möchte das Geschirr spülen, deshalb lässt sie Wasser ins Spülbecken.
Maria想要洗餐具，所以她把水放进了水槽。
3. 使保持原状，使留在原处不动
Lass alles, wie es ist!
不要动它！
4. 寄放在；留下，留在
Nachdem Björn und Vera ihr Gepaeck am Bahnhof gelassen haben, gehen sie ins Stadtzentrum in Köln.
Björn和Vera把他们的行李寄放在车站之后，就去科隆市中心了。
Ich kann meine Brille nicht finden. Weisst du, wo ich sie gelassen habe?
我找不到我的眼镜了。你知道我把它放哪了吗？
固定搭配
1. jn. / etw. weit hinter sich lassen 远远胜过
2. etw. außer Acht lassen 不考虑某事，把某事置之脑后
3. jn. in Ruhe lassen 别吵某人
4. sein Leben lassen 牺牲生命，捐躯
Wir wollen es bei der Vereinbarung lassen.
我们要维持原来的协议不变。
2、助动词。表示请求、愿望、命令或许可等,相当于汉语的“让、 使、叫、受”等词,它后面可跟宾语和不定式或扩展不定式。
例如：Ich lasse meine Haare schneiden.表达让别人为自己做某事的意思。除两点意外，考试常考lassen 的被动含义与被动句的转换。例如Die Kleidungen lassen sich leicht waschen.=Die kleidungen koennen leicht gewascht werden.衣服很容易洗。
lassen有两种意思。一种是实义，一种是助动词。例如:Ich lasse meine Brille zu Hause.我把眼镜落在家里了。这里只有lassen一个动词。而助动词用法和实义很好区分，因为作助动词的lassen后要有一个实义动词与它一起表达某种含义。例如Ich lasse meine Haare schneiden.表达让别人为自己做某事的意思。除两点意外，考试常考lassen 的被动含义与被动句的转换。例如Die Kleidungen lassen sich leicht waschen.=Die kleidungen koennen leicht gewascht werden.衣服很容易洗。
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