1. Would you like to take a look at our products?
您要不要看一下我們的產品？
還能這樣說：
Do you want to have a look at our products?
Would you like to look over our products?
應用解析：
take a look at 看一看

2. Why don't you let me show you how to operate this item?
您為何不讓我向您示范怎么操作這個產品呢？
還能這樣說：
I can show you the operation of the item.
I can display how to use the item.
應用解析：
on display 被展示，被陳列

3. If you press this red button, the helmet becomes an umbrella.
如果你按下這個紅色按鈕，這頂安全帽就變成一把雨傘。
還能這樣說：
Pressing this red button can make the helmet into an umbrella.
The helmet can be changed into an umbrella with the aid of the red button.
應用解析：
under the umbrella of 在……的保護之下；
air umbrella 空中掩護；空中掩護機群

4. You can try it yourself.
你可以自己試試看。
還能這樣說：
You can have a try by yourself.
You can attempt to operate it on your own.