In this exercise, we need to decide if the sentence is talking about something that Picasso used to do or did once.
The sentence reads:
*”He took a trip to Paris in 1900.”*

We use the preterite tense when we are talking about the events and actions that happened only once and were completed in the past.
We use the imperfect form when we are talking about ongoing events in the past, habitual and actions that happened more than once. Also the imperfect is used when we are describing background information, emotions, age, date, weather, etc.

Since we have the verb *hacer* (do) in the preterite tense (hizo), we know that the action happened only once.

did once

In this exercise, we need to decide if the sentence is talking about something that Picasso used to do or did once.
The sentence reads:
*”He spent a lot of time with the artist Andre Breton and the writer Gertrude Stein.”*

We use the preterite tense when we are talking about the events and actions that happened only once and were completed in the past.
We use the imperfect form when we are talking about ongoing events in the past, habitual and actions that happened more than once. Also the imperfect is used when we are describing background information, emotions, age, date, weather, etc.

Since we have the verb *pasar* (pass) in the imperfect tense (pasaba), we know that it is the action he used to do.

used to do

In this exercise, we need to decide if the sentence is talking about something that Picasso used to do or did once.
The sentence reads:
*”He made monochromatic paintings.”*

We use the preterite tense when we are talking about the events and actions that happened only once and were completed in the past.
We use the imperfect form when we are talking about ongoing events in the past, habitual and actions that happened more than once. Also the imperfect is used when we are describing background information, emotions, age, date, weather, etc.

Since we have the verb *hacer* (do) in the imperfect tense (hacía), we know that it is the action he used to do.

used to do

In this exercise, we need to decide if the sentence is talking about something that Picasso used to do or did once.
The sentence reads:
*”He wanted to express the violence and cruelty of the Spanish Civil War.”*

We use the preterite tense when we are talking about the events and actions that happened only once and were completed in the past.
We use the imperfect form when we are talking about ongoing events in the past, habitual and actions that happened more than once. Also the imperfect is used when we are describing background information, emotions, age, date, weather, etc.

Since we have the verb *querer* (want) in the imperfect tense (quería), we know that it is the action he used to do.

used to do

In this exercise, we need to decide if the sentence is talking about something that Picasso used to do or did once.
The sentence reads:
*”He painted the Guernica painting to illustrate the horrors of war.”*

We use the preterite tense when we are talking about the events and actions that happened only once and were completed in the past.
We use the imperfect form when we are talking about ongoing events in the past, habitual and actions that happened more than once. Also the imperfect is used when we are describing background information, emotions, age, date, weather, etc.

Since we have the verb *pintar* (paint) in the preterite tense (pintó), we know that it is the action did once.

did once