English has four sentence types, and each one has its own shape. A statement gives information: 'The shop is closed.' A question asks for information: 'Is the shop closed?' A command asks someone to act: 'Close the shop.' An exclamation shows strong feeling: 'What a lovely shop!' If you use the wrong shape, people may misunderstand your purpose, not just your words.

This is very practical. If you say 'You can help me?' with only rising voice, some listeners will hear a statement and simply answer 'Yes' without moving. If you write 'You send the file' in an email when you mean a question, your colleague may read it as an order and feel annoyed. Choosing the right sentence type first, before you choose the words, makes your intention clear and keeps conversations friendly.

A statement is the basic type you already know: subject first, then verb. 'She works in a bank.' In writing it ends with a full stop. Statements give facts, opinions, and descriptions. All other sentence types are built by changing this basic shape in a fixed, rule-based way, so master the statement first and the others become simple transformations.

A question changes the word order. With the verb 'be' or a helping verb like 'can', 'will', or 'have', you move that verb before the subject: 'She is ready' becomes 'Is she ready?' With other verbs, you add 'do', 'does', or 'did' at the front: 'You like fish' becomes 'Do you like fish?' Notice the main verb goes back to its base form: 'Does she work?', not 'Does she works?' Question words like 'where', 'what', and 'when' go at the very start: 'Where do you live?'

A command drops the subject completely and starts with the base verb: 'Sit down.' 'Take the first left.' This is the one sentence type in English where no subject is spoken; the subject is understood to be 'you'. To make a command negative, put 'don't' first: 'Don't worry.' To sound polite, add 'please' at the start or end: 'Please wait here.' Commands are not always rude — recipes, directions, and instructions all use them naturally.

An exclamation shows emotion and has two common patterns. With a noun, use 'What': 'What a great idea!' 'What terrible weather!' With an adjective or adverb, use 'How': 'How kind!' 'How quickly she learns!' Both end with an exclamation mark. Use exclamations to react warmly to news — they make you sound engaged and friendly — but use them less in formal writing.

The key habit is to decide your purpose before you speak. Do I want to inform? Use statement order. Do I want to ask? Move or add a helping verb. Do I want someone to act? Start with the verb. Do I want to show feeling? Use 'What a...' or 'How...'. One idea can wear all four shapes: 'The door is closed.' 'Is the door closed?' 'Close the door.' 'How quietly you closed the door!'

1. 1. The meeting starts at ten o'clock.

   A plain statement: subject before verb, ending with a full stop.

2. 2. Does the meeting start at ten?

   The helper 'does' comes first, and 'start' returns to its base form.

3. 3. Please start the meeting without me.

   A polite command: no subject, base verb, softened with 'please'.

4. 4. Where did you buy that jacket?

   The question word 'where' comes first, then the helper 'did', then the subject.

5. 5. Is there a bank near here?

   With 'be', we simply move the verb before the subject to ask.

6. 6. Don't touch the screen with wet hands.

   A negative command begins with 'don't' plus the base verb.

7. 7. What a beautiful view this is!

   'What a' plus a noun phrase makes an exclamation about a thing.

8. 8. How quickly the children learned the song!

   'How' plus an adverb makes an exclamation about a manner.

9. 9. Can you open the window, please?

   A question with 'can you' is a polite way to request action.

10. 10. Turn left at the second traffic light.

    Directions use command form; this is normal, not rude.

11. 11. She doesn't eat breakfast on weekdays.

    A negative statement keeps normal order and adds 'doesn't'.

12. 12. Have you finished the report yet?

    The helping verb 'have' moves before the subject to form the question.

13. 13. What terrible traffic we had this morning!

    'What' works without 'a' when the noun is uncountable, like 'traffic'.

14. 14. Why is the printer making that noise?

    Question word first, then 'is' before the subject 'the printer'.

The most common mistake is asking a question with statement order: 'You close the door?' or 'She is coming?' In speech, rising voice can sometimes rescue this, but it often confuses listeners, and in writing it fails completely. English questions need a changed shape: move 'be' or the helper forward ('Is she coming?') or add 'do' ('Did you close the door?'). If your question looks exactly like a statement plus a question mark, rebuild it.

A second mistake is doubling the marking in questions: 'Where does she works?' or 'Do you can swim?' Once the helper 'does' carries the tense, the main verb must go back to its base form: 'Where does she work?' And 'can' never combines with 'do': just move it forward, 'Can you swim?' Remember: only one word in the question carries the grammar; the main verb travels light.

A third mistake is adding 'you' to commands or 'please' to the wrong shape. 'You close the door' is not a command in English; it sounds like a strange statement or even an accusation. A real command starts with the bare verb: 'Close the door, please.' Also, do not turn a command into a question mark hybrid like 'Close the door?' — if you want to be soft, use a real question: 'Could you close the door?'

• Decide your purpose first: inform, ask, request action, or show feeling.
• Questions move 'be' or a helper before the subject, or add 'do'.
• After 'does' or 'did', the main verb returns to its base form.
• Commands start with the bare verb; add 'please' for politeness.
• 'What a' goes with nouns; 'How' goes with adjectives and adverbs.
• For soft requests, use 'Can you...?' or 'Could you...?' instead of commands.