Marta y yo VAMOS a la piscina los martes y los jueves.
Estar o Estamos. Nosotros __Estar__ altos. Nosotros __Estamos__ altos.
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A. usted is forma you use it when adressing a teacher or parent. tu is if you are adressing a freind
I believe why it's important its cuz-
1.The buildings and monuments. Like the Eiffel tower and the arc de triomphe
2.The history. Like the royal castle,palace of versailles,and hub of french political power.
Hope it helped