Used To/ Would

The phrase "used to" is the correct answer because it indicates that the subjects were happy together in the past, but they are not anymore. This phrase is commonly used to talk about past habits or states that are no longer true in the present. In this case, it suggests that there was a time when the subjects were happy together, but that is not the case anymore.

The correct answer is "used to". This is because "used to" is used to describe past habits or states that are no longer true in the present. In this sentence, it implies that the person used to be very overweight in the past but is now much slimmer. "Would" is not the correct answer because it is used to talk about repeated actions or habits in the past, but it does not convey the idea of a change in the present.

have - stative verb

The correct answer is "didn't use to/ would never". This is because the sentence is talking about a past habit or behavior of not doing weekend homework until Sunday evening. The phrase "didn't use to" is used to express a past habit that no longer happens, while "would never" is used to express a strong refusal or unwillingness to do something in the past. Both phrases are suitable in this context.

We can use both constructions because we have past reference and "go out" is an action verb.

The correct answer is "used to" because it indicates a past habit or action. In this context, it suggests that the speaker previously worked in the same department as the listener's sister, but no longer does.

The correct answer is "used to/ would". Both "used to" and "would" can be used to describe past habits or repeated actions. In this case, the speaker is talking about their past routine of working late every night to prepare lessons when they were a newly-trained teacher. Both "used to" and "would" convey the same meaning in this context.

The correct answer is "didn't use to/ would never". This is because the sentence is referring to a past habit or behavior of the individuals when they were in London. The phrase "didn't use to" is used to express a past habit that no longer occurs, and "would never" emphasizes that they never had the intention or desire to travel anywhere on the tube.

The correct answer is "used to/ would." This is because the sentence is referring to a past habit or behavior of driving everywhere when the person had a car. "Used to" and "would" are both used to talk about past habits or repeated actions. In this case, both options are acceptable and convey the same meaning.

The correct answer is "used to." This is because the phrase "used to" is used to talk about past habits or actions that are no longer true or relevant. In this sentence, it implies that he had a habit of going for a run every day in the past, but it is not mentioned whether he still does it or not.

"Should" is used to indicate an obligation or expectation in the past. When used with past reference, it suggests that something was expected or recommended to be done in the past. Additionally, "should" is often used in negatives to indicate that something was not done or should not have been done in the past. It can also be used to describe past habits, indicating that something was regularly done or expected to be done in the past.

The verb phrase "used to" has multiple uses. It can be used without past reference, meaning it can be used to talk about habitual actions or states in the present or future. For example, "I used to go to the gym every day" implies a past habit but does not specify when it stopped. It can also be used in negatives, such as "I didn't used to like vegetables," indicating a change in opinion or preference. Additionally, "used to" can be used to describe past states, as in "She used to be a teacher," indicating a previous occupation or role.