"Do You Know Where Is the Bank?" The Question Inside Another Question

You stop someone in Boston: "Do you know where is the bank?" They point at the corner, but you just made the most stubborn word-order mistake in English — the one that survives C1 and ten years abroad.

The rule fits on one line: when a question sits inside another sentence, English undoes the inversion and the inner part goes back to statement order, subject before verb. Cambridge says it just as flatly: "the same as statement word order (subject + verb)".

The inversion happens once, not twice#

Every sentence gets one inversion, and in an indirect question it is already spent on Do you know…. What follows is a statement in disguise.

Wrong: Do you know where is the bank?
Right: Do you know where the bank is?

The British Council reduces it to a single instruction: "change the question structure to a statement structure". Build the bank is first; Do you know where goes in front of it.

Do disappears too#

Inside that clause there is no do, no does, no did: the auxiliary dissolves and the tense goes back onto the verb.

Wrong: Can you tell me what time is it?
Right: Can you tell me what time it is?

Wrong: I don't know why did he leave.
Right: I don't know why he left.

The BBC names the mistake we hear daily: "no does or did in the indirect questions". At the Miami gate counter: Can you tell me what time the flight leaves?

Why it catches Spanish speakers in particular#

Spanish inverts in both places: No sé dónde está el banco ("I don't know where the bank is") puts the verb in front of the subject inside the embedded clause, where English blocks it. Alejandro Cuza, at Purdue, locates the split there: "It is precisely in embedded questions where English and Spanish entail a different grammatical mechanism: obligatory inversion in Spanish and no movement in English." The mirror shows the same thing: heritage speakers of Spanish invert in 94% of main questions and in 47% of embedded ones.

It's the last stage of the system#

"Cancel inversion" is stage 6 of 6 in the development of English questions. You don't get there by stacking up hours: zero of 45 students reached it after twelve sessions of intensive correction.

Proficiency doesn't settle it either: 37 advanced Spanish speakers scored 58.9 on grammatical sensitivity against 125.8 for native speakers (p = 0.008). Qiaoling He and Isabel Oltra-Massuet close the case: "advanced EFL learners had not yet attained native-equivalent implicit grammar knowledge in English questions, despite their English proficiency level."

Could you say "Could you tell me where the station is?" out loud right now, with nothing to reorder first? That's what Tabla trains: the whole sentence against the clock.

The opposite mistake: the direct question#

In a direct question the inversion is mandatory, and dropping it sounds like a beginner.

Wrong: Where you are from?
Right: Where are you from?

First night out in Austin: Where are you from? Put it inside another sentence and the inversion goes: Could you tell me where you're from?, the default polite form with strangers.

On the London Underground, how do you ask, indirectly, whether the train stops at King's Cross?

You say "Do you know if this train stops at King's Cross?": does disappears, if comes in, and the verb takes its -s back.

Try this today: say "Do you know where the bank is?" out loud three times, then "Where is the bank?" — notice where the verb lands.