Learn Spanish (Latin America): Ustedes veían esos kioscos en la avenida. - You used to see those kiosks on the avenue.

Ver (to see) is one of the three irregular verbs in the imperfect tense. Normally, an -er verb drops the ending and adds -ía (like comer becoming comía). But ver keeps its e, so the base becomes veía. For ustedes, you add the -n to make veían.

Why does this translate to "used to see" rather than "saw"?

The imperfect tense is used for ongoing or repeated actions in the past. Translating it as "used to see" shows that this was a habit or something that happened regularly. If it was a completed, one-time event, you would use the preterite tense: vieron.

I always mix up esos and estos. How do I remember which means "those"?

A common trick is the rhyme: "This and these have the T's, that and those don't." So estos means "these" (it has a T), while esos means "those" (no T). Since kioscos is a masculine plural noun, we use the masculine plural form esos.

Do we need to include ustedes at the beginning of the sentence?