Module 2 Grammar Reference: Past and Perfect Tenses

Vocabulary practice flashcards covering forms, spelling rules, time expressions, and uses of past tenses from Module 2: Past Simple, Past Continuous, Present Perfect, Past Perfect, Past Perfect Continuous, and habit structures (used to, would, be/get used to).

Past Simple (Affirmative Form)

Formed by adding -ed to the base form of regular verbs, while some verbs have an irregular past form (e.g., looked, ran).

Past Simple Spelling Rule: Verbs ending in -e

Add -d to verbs ending in -e (e.g., bake becomes baked).

Past Simple Spelling Rule: Verbs ending in consonant + -y

Drop the -y and add -ied (e.g., cry becomes cried).

Past Simple Spelling Rule: Verbs ending in vowel + -y

Add -ed directly to the verb without changing the y (e.g., play becomes played).

Past Simple Spelling Rule: Stressed vowel between two consonants

Double the final consonant and add -ed (e.g., stop becomes stopped).

Past Simple (Uses)

Used for actions that happened at a specific time (stated, implied, or already known) in the past, past habits, actions occurring one after another, and actions that will not take place again.

Time expressions used with the Past Simple

Time markers including yesterday, yesterday morning/evening, last night/week, two weeks/a month ago, and in 2010.

Present Perfect (Unstated Time)

Used to describe an action that occurred at an unstated time in the past (e.g., "They have put out the fire. We don't know when.").

Present Perfect (Continuing Action)

Used for an action that started in the past and continues into the present (e.g., "Mark has worked for NASA since 2010. He still works for NASA.").

Past Simple vs Present Perfect (Timing)

Past simple specifies actions at a stated time or actions that started and finished in the past, whereas present perfect refers to actions at an unstated time or actions still continuing in the present.

Past Continuous (Form)

Constructed using was/were + verb -ing (affirmative: was/were sitting; negative: wasn't/weren't sitting; interrogative: Was/Were … sitting?).

Past Continuous (Action in Progress at a Stated Time)

Used for an action in progress at a stated time in the past when it is unknown when the action started or finished (e.g., "It was raining at midnight yesterday.").

Past Continuous (Interrupted Action)

Used for a past action in progress (longer action) that was interrupted by another action (shorter action in the past simple).

Past Continuous (Simultaneous Actions)

Used for two or more actions happening at the exact same time in the past (e.g., "While the tornado was approaching the coast, the people were going to higher ground.").

Past Continuous (Background Information)

Used to establish setting and background information in a story (e.g., "It was an awful night. It was raining heavily and the river was starting to flood.").

Time expressions used with the Past Continuous

Connectors and temporal phrases including while, when, as, all day/night/morning, and yesterday.

used to / Past Simple

Used to describe past habits or actions that took place regularly in the past but no longer happen (e.g., "He used to go/went camping every summer.").

would (Past Habit)

Used to express repeated past actions and routines, but cannot be used with stative verbs.

be used to

An expression meaning "to be in the habit of" something.

get used to

An expression meaning "to become accustomed to" something.

Past Perfect (Form)

Formed using subject + had + past participle of the main verb (affirmative: had taken; negative: had not/hadn't taken; interrogative: Had … taken?).

Past Perfect (Prior Action or Stated Time)

Used for an action that completed before another past action or before a stated point of time in the past (e.g., "The storm had passed by the time we woke up.").

Past Perfect (Visible Result)

Used for an action that finished in the past whose result was visible at a later moment in the past (e.g., "Aaron was upset because he had heard some bad news.").

Past Perfect (Relation to Present Perfect)

Serves as the past equivalent of the present perfect (e.g., "There was no snow on the ground – the sun had melted it." vs. "There is no snow on the ground – the sun has melted it.").

Time expressions used with the Past Perfect

Words indicating completed timing including before, after, already, just, for, since, till/until, by, and never.

Past Perfect Continuous (Form)

Formed using subject + had + been + main verb -ing (affirmative: had been running; negative: had not/hadn't been running; interrogative: Had … been running?).

Past Perfect Continuous (Duration Emphasis)

Used to emphasize the duration of an action that started and finished in the past before another action or stated past time, usually with for or since.

Past Perfect Continuous (Visible Result)

Used for an action that lasted for some duration in the past and whose visible result appeared in the past (e.g., "It had been raining for two days, so the streets were flooded.").

Past Perfect Continuous (Relation to Present Perfect Continuous)

Serves as the past equivalent of the present perfect continuous (e.g., "The ground was white because it had been snowing all day.").