let的用法如下：
1、[no passive] 允许；让
to allow sb to do sth or sth to happen without trying to stop it
[VN inf] Let them splash around in the pool for a while.
让他们在水池里扑腾一会儿吧。
Don't let her upset you.
别让她搅得你心烦。
Let your body relax.
让你的身体放松。
[VN] He'd eat chocolate all day long if I let him.
我要是不拦着，他会整天不停地吃巧克力。
2、准许；许可；同意
to give sb permission to do sth
[VN inf] They won't let him leave the country.
他们不许他离开这个国家。
[VN] She wanted to lend me some money but I wouldn't let her.
她想借给我一些钱，可我不同意。
3、[VN + adv./prep.] 允许（去某处）
to allow sb/sth to go somewhere
to let sb into the house
允许某人进屋
I'll give you a key so that you can let yourself in.
我把钥匙给你，你可以自己开门进去。
Please let me past.
请让我过去。
The cat wants to be let out.
那只猫想要出去。
提出建议 making suggestions
4、[no passive] （提出建议时说）
used for making suggestions
[VN inf] Let's go to the beach.
咱们去海滩吧。
Let's not tell her what we did.
咱们干的事可别告诉她。
(BrE) Don't let's tell her what we did.
咱们干的事可别告诉她。
I don't think we'll make it, but let's try anyway.
我认为我们不一定会成功，但不管怎样还是试一试吧。
[VN] ‘Shall we check it again?’ ‘Yes, let's.’
“我们再检查一下好吗？”“好的。”
提供帮助 offering help
5、[VN inf] [no passive] （提出帮助时说）让，由
used for offering help to sb
Here, let me do it.
喂，让我来吧。
Let us get those boxes down for you.
让我们帮你把那些箱子搬下来吧。
拓展资料
1、People said we were interfering with nature, and that we should just let the animals die
人们说我们是在干涉自然界，还说我们应该任由动物死去。
2、I love sweets but Mum doesn't let me have them very often
我爱吃糖，可妈妈不让我常吃。
3、I had to get up at seven o'clock this morning to let them into the building because they had lost their keys
今天早上我不得不7点钟就起床开门让他们进楼，因为他们把钥匙弄丢了。
4、Let me say it again. I despised Wade's life
我再说一遍。我厌恶韦德的生活方式。
5、Let me take your coat
我来帮您拿外套。