The past continuous tense is used to describe an action that was in progress at a specific time in the past. It is formed using the past tense of the verb "to be" (was/were) + the present participle (-ing) of the main verb.
The past continuous is often used in conjunction with the past simple tense to indicate that one action was in progress when another action occurred.
For example, "I was studying when he called" indicates that the speaker was in the middle of studying when they received a phone call.
It is also used to indicate an action that was temporary or in progress for a period of time in the past.
Example: "I was living in New York City for two years before I moved to London"
It is also used to describe two actions that occurred simultaneously in the past, one with past continuous and the other with past simple.
Example: "He was washing the dishes while she was making the bed."

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