The past simple, also called the simple past, is the tense you reach for most when you talk about the past. It describes something that started and finished at a known time before now. The good news is that the form barely changes: unlike many languages, English uses one past simple form for every person.

How to form the past simple

For regular verbs, you add -ed to the base form. That is the whole rule, and it is the same for I, you, he, she, it, we and they.

So I worked, she worked, they worked are all identical. There is no extra -s for he or she the way there is in the present.

Spelling rules for -ed

The -ed ending has a few spelling adjustments worth learning:

A vowel + y does not change: play becomes played, not "plaied". And the doubling rule only applies after a short, stressed vowel, so stop becomes stopped but open stays opened (the stress is on the first syllable).

The three pronunciations of -ed

The spelling is always -ed, but it is said in three different ways depending on the sound before it:

Only the third group adds an extra syllable. Wanted has two beats; worked has one.

Irregular verbs

Many common verbs do not follow the -ed rule. You simply have to learn their past forms, but the comfort is that the form is still the same for every person: I went, you went, he went, they went.

The most frequent verbs in English are usually irregular, so these are worth memorising early. There is no shortcut: go becomes went, not "goed".

Was and were: the past of "be"

The verb be is the one exception that does change by person. It has two past forms:

I was at home. They were late. She was a teacher. The negatives are wasn't and weren't, and questions invert the verb: Was he there? Were you tired? Note that be does not use did; it makes its own questions and negatives.

Questions and negatives: the auxiliary "did"

For every verb except be, you form questions and negatives with the auxiliary did (the past of do). This is the part learners most often get wrong.

The key rule: once you use did, the main verb returns to its base form. The past tense is already carried by did, so the main verb does not need it too.

• Question: Did you go? Did she finish? Did they know?
• Negative: I didn't go. He didn't finish. We didn't know.

So it is Did you go? and never "Did you went?". The form "did + past verb" puts the past in two places at once, which English does not allow.

When to use the past simple

The past simple has three main jobs.

1. A finished action at a finished time

The action is over, and you know (or could say) when it happened.

• I bought a car last month.
• She left at six o'clock.

2. A sequence of past events

When you tell a story, the past simple lists the events in order.

• He woke up, made coffee and read the news.
• We arrived, checked in and went straight to bed.

3. Past habits and states

Things that were true or repeated over a past period.

• I played the violin as a child.
• They lived in Spain for years.

Time expressions that signal the past simple

Certain words point to a finished past time and almost always take the past simple:

• yesterday (I saw him yesterday.)
• last week / last year (We met last week.)
• in 2010 (She graduated in 2010.)
• two days ago (He called two days ago.)
• ago in general (They moved here ten years ago.)

If a sentence pins the action to a specific finished time like these, the past simple is the natural choice.

Past simple vs present perfect

This is the distinction that causes the most trouble. The short version: the past simple needs a finished time, while the present perfect is for unfinished or unstated time that connects to now.

• I saw that film yesterday. (Finished time, so past simple.)
• I have seen that film. (No time stated, just the experience.)

The test: if you say exactly when something happened, use the past simple. I have seen him yesterday is wrong; it must be I saw him yesterday. For the full picture, see the present perfect.

Common mistakes

Ranked by how often they actually appear:

1. Double past after "did". Did you went? She didn't came. Wrong. Once you use did, the main verb is in the base form: Did you go? She didn't come.
2. Treating irregular verbs as regular. He goed, they buyed, I thinked. These verbs are irregular: went, bought, thought.
3. Using the past simple where the present perfect is needed. I lived here for ten years (and still do) should be I have lived here for ten years. If the situation continues to now, use the present perfect.
4. Confusing was and were. We was late should be We were late; they was here should be they were here.

Practice

Put the verb in the past simple. Answers are below.

1. We ___ (go) to the beach yesterday.
2. ___ you ___ (finish) the report last night?
3. She ___ (study) French at university.
4. They ___ (not be) at home when I called.
5. He ___ (stop) the car and ___ (get) out.

Answers: 1. went 2. Did ... finish (base form after "did") 3. studied (consonant + y becomes -ied) 4. were not / weren't 5. stopped (doubled consonant), got