¡Hola, abuela! Mi vecina Julia me está ayudando con la cocina. Ella corta las patatas mientras yo trituro el ajo.
Explanation:
In English this means: Hi, grandma! My neighbor Julia is helping me in the kitchen. She slices the potatoes while I crush the garlic. The tenses used are present continuous and simple present. The present continuous in Spanish is called "progresivo" and is formed by the verb estar and the verb of the action in the participle. In this case: "está ayudando". This means the action is taking place right now. The other sentence has two actions happening at the same time, and it can be said using the simple present.
