The present continuous, also called the present progressive, is the tense for things in progress. If the present simple is the tense of facts and routines, the present continuous is the tense of right now and around now. It is one of the first tenses learners meet, and the form is mechanical once you have it, but two things trip people up: the -ing spelling and the small set of verbs that refuse to take it at all.

How to form the present continuous

The structure never changes:

am / is / are + verb-ing

The auxiliary (am, is, are) is a form of the verb be, and it does all the grammatical work. The main verb just sits in its -ing form and never changes for the subject.

• Negative: add not after the auxiliary. I am not working. She is not reading. They are not coming. The short forms are isn't and aren't (am not contracts only in the subject: I'm not).
• Question: put the auxiliary first. Are you working? Is she reading? What are they doing?

Notice you do not add a second auxiliary. The be verb is already there, so there is no do or does as in the present simple. In speech and informal writing the auxiliary almost always contracts: I'm working, you're reading, she's sleeping, they aren't coming. The full forms are reserved for emphasis (I am working, thank you) and formal writing.

Spelling the -ing form

Most verbs just add -ing (play - playing, read - reading, go - going). Three groups need a small change first.

A few cautions on the doubling rule. You double only when a single consonant follows a single stressed vowel: sit - sitting, but open - opening (the stress is on the first syllable, so no doubling). British English also doubles a final l after a vowel even when the stress is elsewhere: travel - travelling, cancel - cancelling. American English keeps the single l (traveling, canceling).

When to use the present continuous

There are five jobs it does. Every present continuous sentence is doing one of them.

1. An action happening right now

The action is in progress at the moment of speaking.

• I am writing an email.
• Listen - the baby is crying.

2. A temporary action around now

It is true these days, but not at this exact second, and it will not last.

• I am reading a great novel. (Not literally right now, but currently.)
• She is working in Berlin this month.

3. A fixed future arrangement

The plan is already settled, usually with a time or place agreed.

• I am meeting him tomorrow.
• We are flying to Madrid on Friday.

4. A changing or developing situation

Trends and processes that are in motion.

• Prices are rising.
• The climate is getting warmer.

5. Annoying habits with always

Add always (or constantly, forever) to complain about a repeated habit. This is the one use where the continuous describes something frequent rather than temporary.

• He is always losing his keys.
• You are constantly interrupting me.

The confusion: stative verbs

Some verbs describe a state, not an action, and English does not normally put them in the continuous. These are stative verbs, and they fall into a few groups:

• Thinking and knowing: know, believe, understand, remember, mean
• Liking and wanting: like, love, hate, want, prefer, need
• Having and belonging: have (possession), own, belong, contain
• Senses and appearance: seem, appear

So you say I know the answer, not I am knowing the answer; She wants a coffee, not She is wanting a coffee; This box contains nothing, not is containing.

The exceptions are where it gets interesting. A stative verb can go in the continuous when it shifts to mean a deliberate action.

• I'm thinking about it. (the mental process, an action) vs I think you're right. (an opinion, a state)
• I'm having lunch. (eating, an action) vs I have a car. (possession, a state)
• I'm loving it. (informal, a temporary feeling right now) vs I love my job. (a permanent state)

I'm loving it is grammatically marked but extremely common, especially in informal and advertising English. Use the simple form for the safe, standard choice.

A useful rule of thumb: if you could not honestly answer the question "what are you doing?" with the verb, it is probably stative. You cannot reply "I'm knowing" or "I'm wanting" to that question, which is exactly why those verbs resist the continuous.

Present simple vs present continuous

This is the comparison that matters most. The split is between general and specific, permanent and temporary.

The test: if it is a general truth or a regular habit, use the present simple. If it is happening now or only temporary, use the present continuous. For the full picture of the other half, see the present simple.

Common mistakes

Ranked by how often they actually appear:

1. Putting stative verbs in the continuous. I am knowing the answer. She is wanting a coffee. Wrong. Stative verbs stay simple: I know the answer. She wants a coffee.
2. Forgetting the be auxiliary. I working now. She reading. The tense needs am, is or are: I am working now. She is reading. This is the single most common slip, because many languages build the -ing-style form without a separate verb.
3. Using it for permanent facts. I am living in Spain is fine if it is temporary, but The sun is rising in the east every day should be The sun rises in the east. Permanent truths take the present simple.
4. Wrong -ing spelling. writeing, runing, lieing. It is writing, running, lying.
5. Adding a second auxiliary in questions. Do you working? Does she reading? Wrong. The be verb already inverts: Are you working? Is she reading?

British vs American usage

The two varieties mostly agree here. The visible difference is in the -ing spelling of verbs ending in l: British English doubles it (travelling, cancelling, modelling), American English does not (traveling, canceling, modeling). If you are learning British English, double the l.

Practice

Put the verb into the present continuous, or choose the correct form. Answers are below.

1. Be quiet - the children ___ (sleep).
2. I ___ (meet) my dentist tomorrow at ten.
3. Choose: I know / I am knowing what you mean.
4. Look! It ___ (rain) again.
5. He ___ (always / forget) his password.

Answers: 1. are sleeping 2. am meeting (a fixed future arrangement) 3. I know ("know" is a stative verb, so it stays simple) 4. is raining 5. is always forgetting (the always habit pattern)