The grammar of real conversation is not broken writing; it is a different system with its own rules. Native speakers say "Nice day, isn't it?" without a subject or verb at the start, add tails like "The new office, it feels quiet", and answer with tokens like "Right", "Fair enough", or "No way." If you only know textbook sentences, your speech sounds stiff and slow, and you may misread friendliness as bad grammar.

The opposite risk is just as real: bringing conversation grammar into formal writing. A report that says "Great results, right?" sounds unprofessional. The skill you are learning here is control: use spoken patterns on purpose in talk, and switch them off in formal text. That switch is what makes you sound advanced.

Start with fragments. In conversation, English drops words that the situation already supplies, usually the subject and the verb "be" at the start: "(It is a) Nice day." "(Do you) Want some coffee?" "(I am) Sorry about that." These are called situational ellipsis. They are normal and polite in speech and chat messages, but in formal writing every sentence needs its subject and verb back.

Next, tails and heads. A tail repeats the topic as a noun phrase after the clause: "It feels quiet, the new office." A head does the opposite, announcing the topic first: "The new office, it feels quiet." Speakers use heads to signal what they are about to talk about, and tails to clarify or add feeling at the end. The pronoun inside the clause must match the noun phrase outside it: "My neighbours, they are very friendly."

Question tags are small questions glued to a statement to invite agreement or check facts. The rule is reversal: a positive statement takes a negative tag, and a negative statement takes a positive tag. "Nice day, isn't it?" "You haven't seen my keys, have you?" The tag copies the auxiliary from the statement; if there is no auxiliary, use do: "She works here, doesn't she?" A falling voice on the tag means "agree with me"; a rising voice means "I am really asking."

Response tokens are the tiny words that keep a conversation alive: "Right." "Really?" "Exactly." "Fair enough." "You're kidding!" They show you are listening and how you feel about what you heard. Silence where a token should be makes English speakers feel you are bored or annoyed, so learn a small set and use them naturally.

Finally, the register switch. The same idea changes clothes across situations. Spoken: "The printer, it's broken again, isn't it?" Work message: "The printer seems to be broken again." Formal report: "The printer has malfunctioned repeatedly this month." Nothing in the spoken version is wrong; it is simply wrong for a report. Before you speak or write, ask one question: is this a conversation or a document? Then choose the matching grammar.

1. 1. Lovely weather today, isn't it?

   A fragment plus a negative tag after a positive idea invites agreement.

2. 2. You couldn't pass the salt, could you?

   Negative statement takes a positive tag; this pattern makes a soft request.

3. 3. That new bakery, it smells amazing every morning.

   A head announces the topic first, then the pronoun "it" continues it.

4. 4. They were really helpful, the hotel staff.

   A tail adds the full noun phrase after the clause to clarify "they".

5. 5. Want another cup of tea?

   Situational ellipsis drops "Do you" because the listener is right there.

6. 6. Sounds good. See you at eight, then.

   Two fragments in a row are natural closing moves in speech.

7. 7. She has finished the report, hasn't she?

   The tag copies the auxiliary "has" from the statement.

8. 8. Your brother works in Leeds, doesn't he?

   No auxiliary in the statement, so the tag borrows "does".

9. 9. A: The flight was cancelled. B: You're kidding!

   A response token shows surprise and keeps the conversation moving.

10. 10. A: I'll pay this time. B: Fair enough.

    "Fair enough" accepts an offer or argument without a full sentence.

11. 11. Bit cold in here, don't you think?

    Fragment plus an opinion tag softens a complaint about the room.

12. 12. Nobody called about the order, did they?

    "Nobody" is negative, so the tag turns positive and uses "they".

13. 13. My back, it hurts every time I lift boxes.

    A health topic fronted as a head, then tracked by "it".

14. 14. Let's take the earlier train, shall we?

    "Let's" takes the special tag "shall we" when suggesting plans.

The first mistake is copying the polarity in tags. Learners say "Nice day, is it?" after a positive idea. Wrong: "Nice day, is it?" Right: "Nice day, isn't it?" The tag must reverse: positive statement, negative tag; negative statement, positive tag. A same-polarity tag does exist in English, but it signals suspicion or irony ("Oh, so you're the manager, are you?"), so using it by accident can sound rude.

The second mistake is building the tag from the wrong verb. Learners say "She works here, isn't it?" using one frozen tag for everything. Wrong: "She works here, isn't it?" Right: "She works here, doesn't she?" The tag must copy the statement's auxiliary and subject: has she, will they, doesn't he. If your language uses one universal tag, slow down and rebuild it each time from the sentence in front of you.

The third mistake is register leakage in both directions. Some learners write fragments and tails in formal emails: "The invoice, it's wrong." Right for a report: "The invoice appears to be incorrect." Others do the opposite and speak in full written sentences: "I am in agreement with your proposal" at lunch sounds cold; "Sounds good" is the natural spoken form. Neither system is better; each belongs to its own place.

• Positive sentence, negative tag; negative sentence, positive tag.
• Build each tag from the sentence's own auxiliary and subject.
• Heads introduce a topic: "That cafe, it never closes."
• Tails clarify at the end: "They're loud, those new machines."
• Keep a pocket set of tokens: Right, Really, Exactly, Fair enough.
• Fragments live in speech and chat; give reports full sentences.