Listen to the whole passage
Listen to the whole passage once first, then practice sentence by sentence.
The first line is the other person opening the conversation; the "You" lines are suggestions for you to practice saying in this scenario (not a back-and-forth dialogue).
A friend gardening with you
今天天气很好，我们一起做点儿事，好吗？
The weather is nice today; let's do a bit of work together, okay?
You
今天没下雨，天气很好。
It didn't rain today, the weather is nice.
You
这儿的花要水吗？
Do these flowers need water?
You
要多少水？
How much water do they need?
You
我们一起做吧。
Let's do it together.
You
你看，这些花很漂亮。
Look, these flowers are beautiful.
You
天气太热了，我想喝水。
It's too hot, I'd like some water.
You
做好了，我很高兴。
We're done, I'm so happy.