I had a large backpack and a smaller daypack.
我有两个书包，一大一小。

smaller是small的比较级，是个形容词，只能用来修饰名词和名词短语，它的前面应该加be动词。
它的意思是比较小的。那么造句时只要根据它的意思造句，并考虑到它前后只能加什么词性的词语就可以了。
举个例子给你
The rat is smaller than then elephant!

small
KK: []
DJ: []
a.
1. 小的;小型的
My bedroom is smaller than yours.
我的卧室比你的小。
2. 少的,少量的;几乎没有的
He has small 搜趣网hope of getting the job.
他没什么希望获得那份工作。
3. 细小的,瘦小的;幼小的
Dave is a small man.
戴夫长得瘦小。
4. 低微的;不重要的
He played a small part in the play.
他在这出戏里演一个小角色。
5. 小气的;卑劣的;小心眼儿的
It's small of him to act like that.
他那样做未免太小气了。
6. 轻微的;(声音)低的
She talked in a small voice with her boyfriend.
她细声细气地跟她男友说话。
7. (字母)小写的
ad.
1. 小声地
She spoke as small as possible.
她尽量放低声音说话。
2. 小小地,细小地
She writes a bit too small.
她的字写得太小了一点。
3. 小气地;卑鄙地
4. 轻蔑地
They thought small oInezUdsQrf him at first.
他们起初都小看他。
5. 成小块地
n.
1. 细小(或狭小)的部分[the S]
2. 小件物品[P]
3. 矮小的人[C]
Our house is smaller than yours but I think the garden is bigger.
我们的房子比你们的小，但花园比你们的大。
The car cost me a small fortune.
这辆汽车花了我很多钱。
Th//www.souquanme.come penalty clause was hidden in the small print.
惩罚条款印在不起眼的小搜趣网号字体部分。
Compare small and little.
试比较small和little这两个词.
The words ' small' and ' bad' are adjectives.
‘small’和‘bad’是形容词。
By frugality she managed to get along on her small salary.
她设法以自己微薄的薪水生活。
Propeller meters introduce small pressure losses.
螺旋浆式流量计的压力损失
A seed company consolidated few small farms.
一家种子公司合并了几家小农
A small difference between them will render the composite translucent.
微小的差别，也会使复合材料变成半透明。
A small motor revolves the wheels.
一台小马达驱动着轮子旋转。
A small party was made up.
我们组织了一个小小的团体。
A small percentage of the fa//www.souquanme.comrm produce was ruined.
农产品中的一小部分坏掉了。

The kite become smaller and smaller.
风筝越来越小.
It seems that the world is getting smaller and smaller.
似乎世界越变越小.
希望对你有帮助！