How to write metaphorical sentences in English composition

1. This wandering bird flies alone in the sky, just like a boat in the Wang Yang.

Separated birds fly in the sky, just like canoes on the sea.

Desertification is like a hungry wolf, mercilessly devouring forests, grasslands and our living space.

Desertification, like a hungry wolf, is mercilessly devouring forests, lawns and our living space.

In fact, metaphorical sentences in English mainly use as ... like ... sentence patterns or just use as, like and other words.