What is, what is writing a sentence?

What's in the sentence:

1, the bird hummed a tune in the sky, flying freely, the flowers cheered for him, the grass danced for her, he and Sister Baiyun played hide-and-seek in the sky, and everything was so beautiful.

Birds fly in the sky, dance among flowers, sing in the Woods and play on the grass.

I am enjoying the beautiful flowers, enjoying the cool under the big tree, enjoying the warm breeze and looking up at the blue sky.

I am drinking tea, listening to elegant music, enjoying a beautiful afternoon and watching the pedestrians in the street.

The children are playing in the kindergarten, some are playing football, some are singing, some are playing on the slide, and some are drawing.