Learn Spanish (Latin America): La forma del carro es bonita.

In Spanish, when the preposition de (of) is immediately followed by the masculine article el (the), they must combine to form the contraction del. You will always see del carro instead of de el carro.

Why is it bonita (feminine) if carro is a masculine word?

The adjective bonita (pretty) is describing la forma (the shape), which is a feminine word. Even though carro is closer to the verb, the main subject of the sentence is the shape, not the car itself!

Why do we use es instead of está for "is"?

We use es (from the verb ser) because the shape of a car is a basic, defining characteristic. We use ser to describe what things are like, while estar is used for temporary states or locations.

Can I say "el carro's forma" to mean "the car's shape"?

No, Spanish doesn't have an equivalent to the English apostrophe-s for possession. Instead, you always have to use the structure "the [thing] of the [owner]." That is why "the car's shape" becomes la forma del carro (the shape of the car).