Is That Suits You? | Grammar Fix Guide

For the phrase in the title, the correct English question is “Does that suit you?”—use do/does with the base verb.

If you’ve ever typed that string of words and paused, you’re not alone. English questions in the present use a helper word before the subject, and the main verb stays in its base form. That’s why the natural question a native speaker uses is “Does that suit you?” not the version with “is” and “suits.”

Why The Phrase Feels Off

The phrase packs two problems into four words. First, “is” only joins with forms of “be” and with -ing actions. Second, “suits” already carries a present tense ending, so pairing it with “is” doubles the marker. You end up with an extra tense signal and no helper that matches the normal pattern for questions. Swap in “does,” drop the -s on the main verb, and the sentence clicks into place.

Does That Suit You? The Correct Question Form

In present time, questions follow a clear shape: do/does + subject + base verb. For third person singular (he, she, it, this, that), use does and keep the verb bare: Does that suit you? For I/you/we/they, use do: Do these times suit you? When the subject comes first, you can keep “suits” without a helper, but that’s a statement, not a question: That suits me.

Quick Reference Table: Question Patterns In Present Time

Use this small chart to swap subjects and build clean questions fast.

Subject	Correct Question	Why It Works
he / she / it / this / that	Does that suit you?	“Does” carries tense; “suit” stays base.
I / you / we / they	Do these times suit you?	“Do” for plural and “you”; verb is base.
name or thing	Does the plan suit everyone?	Third person uses “does” + base verb.

What The Verb Means

The verb “suit” means “to be right for” or “to be convenient for.” In style talk, it can also mean “to look good on.” So the question “Does that suit you?” asks about fit, convenience, or preference. In a clothing line, it asks whether a color or cut looks good on the person. In a schedule thread, it asks whether a time works for them.

The Rule Behind Do/Does

English pushes tense onto a helper in present time questions. That helper is a short form of “do.” Then the main verb stays in the root form. This move is called “do support” in standard grammar notes, and you can see it in the British Council guide to the present simple (present simple questions).

Common Mix-Ups And How To Fix Them

Mix-Up 1: Using “Is” With A Plain Verb

“Is” teams with adjectives or with -ing forms: Is that okay? or Is that suiting you? The second version works in narrow contexts, but it sounds odd for schedules or choices. The clean, everyday question is with “does.”

Mix-Up 2: Keeping The -s After “Does”

Once you pick “does,” the main verb must drop the -s. Say Does that suit you? not “Does that suits you?” The helper already marks person and tense, so the main verb stays plain.

Mix-Up 3: Confusing “Fit” And “Suit”

“Fit” talks about size and shape. “Suit” talks about style, convenience, or preference. A jacket can fit the shoulders but not suit the person’s taste. A Monday slot might suit everyone yet not fit a two-hour session. Cambridge has a neat note that contrasts the two verbs (fit or suit?).

Short Patterns You Can Reuse

Drop these into messages with a tiny edit now.

Does Tuesday suit you?
Do mornings suit your team?
Does that shade suit your skin tone?
Do these dates suit the group?
Does this route suit your plans?

When You Can Use “Is” Instead

Use “is” when the main word is an adjective or a noun phrase: Is that okay? Is that a good time? Use “is” with -ing to ask about actions in progress: Is that suiting you? That last line can sound stiff in everyday chat, so keep it for narrow cases like an ongoing trial period or a fit you expect to change.

Polite Variants That Keep The Same Meaning

You can soften the tone without changing the grammar. Try these small tweaks.

Would that suit you?
Would this time suit everyone?
Might Thursday suit you better?
What time would suit you?

Past And Future Time With “Suit”

Shift the helper or add “will” to move the sentence through time. In past time questions, use “did” and keep “suit” in base form: Did that suit you yesterday? For future plans, use “will”: Will that suit you next week? For ongoing plans, pair with “would” to keep the tone light: Would that suit you if we move the call?

Style And Politeness In Real Messages

A short, friendly line beats a long, stiff block. Add a thank-you or a brief reason when you ask about times or choices. Here are message starters that land well in work mail or chat apps.

Quick check: Does that suit you?
Happy to adjust— Does this plan suit your day?
Open to other options— Do these windows suit you?

Proof From Trusted Grammar Sources

Standard dictionaries and learning sites show the same pattern. You’ll find examples like “Would that suit you?” and the core meaning “to be right for someone” in entries from Oxford and Merriam-Webster. The helper rule for questions appears across guides, including the British Council’s page linked above. Major dictionaries list senses like “to be right for” with examples and common collocations.

Mini Drills To Lock It In

Try these quick swaps. Change each prompt into a clean question. Answers sit right below—no scrolling around.

That time suits you. → ______ that suit you?
These dates suit the team. → ______ these dates suit the team?
Her color suits her. → ______ that color suit her?
The plan suits us. → ______ the plan suit us?

Answers: 1) Does 2) Do 3) Does 4) Does

When “Suit” Talks About Style

Outside schedules, “suit” often links to clothing, colors, and cuts. “That cut suits you” means it looks good on you. In that area, people also use the noun “suit” for a tailored set. Don’t let that distract you; the verb keeps the same grammar. The question still follows the helper rule: Does this color suit you?

Wrinkles With Third Person Subjects

Third person singular is where many slips happen. In statements, you need the -s: It suits her. In questions, you move that -s to the helper: Does it suit her? Same idea for negatives: It doesn’t suit her. Keep the main verb bare in both cases.

Forms At A Glance

Here’s a compact chart you can check while you write. It lines up the three core sentence types for quick edits for quick checks.

Form	Pattern	Example
Statement	subject + verb-s	That suits me.
Negative	subject + do/does not + base	That does not suit me.
Yes/No question	do/does + subject + base?	Does that suit you?
Wh-question	wh-word + do/does + subject + base?	When does that suit you?

Beyond Yes/No Questions

You’re not limited to yes/no shapes. Add wh-words at the front and keep the helper next to them: When does that suit you? Which times do you prefer? The do/does rule still runs the show.

Reference Links For Deeper Reading

For detailed rules on present questions with do/does, see the British Council’s page on the present simple (reference page). For a clear contrast between “fit” and “suit,” see Cambridge’s grammar note (fit vs. suit).