Când termin, voi opri aspiratorul și voi închide ușa.

This is one of the most common things English speakers notice.

In Romanian, after time words such as când (when), the verb is often in the present tense, even when the meaning is future.

So:

• Când termin = When I finish
• not literally When I am finishing

This is very natural in Romanian. English does something similar too:

• When I finish, I’ll turn off the vacuum cleaner.

You do not usually say When I will finish... in standard English, and Romanian works similarly here.

So the pattern is:

• Când + present tense, then
• future in the main clause if needed

Example:

• Când ajung, te sun. = When I arrive, I’ll call you.

Voi is the auxiliary used to form the future tense in Romanian.

In this sentence:

• voi opri = I will turn off / stop
• voi închide = I will close

So voi here means will.

This future is built like this:

• voi
  • infinitive

Examples:

• voi merge = I will go
• voi face = I will do
• voi închide = I will close

For eu (I), the future auxiliary is voi.

In standard Romanian, it is best to repeat voi before each coordinated verb:

• voi opri aspiratorul și voi închide ușa

That is the clearest and most natural full form.

If you leave out the second voi, the sentence may sound incomplete or less standard to many learners and speakers in careful language. Romanian normally likes the auxiliary to be expressed with each future verb in this structure.

So the safest pattern is:

• voi + verb ... și voi + verb

Examples:

• Voi mânca și voi pleca.
• Voi citi și voi scrie.

Romanian often drops subject pronouns because the verb ending already shows the person.

Here, termin clearly means I finish, so eu is not necessary.

• termin = I finish
• voi opri = I will turn off
• voi închide = I will close

You can add eu for emphasis or contrast, but normally you leave it out.

Compare:

• Când termin, voi opri aspiratorul. = neutral, natural
• Când eu termin, voi opri aspiratorul. = marked, emphatic, less usual in ordinary speech

Romanian is much more comfortable than English with leaving out subject pronouns.

Romanian usually puts the definite article at the end of the noun, not before it.

So:

• aspirator = vacuum cleaner
• aspiratorul = the vacuum cleaner

and:

• ușă = door
• ușa = the door

This is called the enclitic definite article.

Very roughly:

• masculine singular often takes -ul
• feminine singular often takes -a

Examples:

• băiat → băiatul = the boy
• fată → fata = the girl
• ușă → ușa = the door

So there is no separate word like English the here; it is attached to the noun.

They mean different kinds of actions:

• a opri = to stop, to switch off, to turn off
• a închide = to close, and sometimes to shut off depending on context

In this sentence:

• voi opri aspiratorul = I will turn off the vacuum cleaner
• voi închide ușa = I will close the door

You use a opri for something operating, moving, or running:

• opresc mașina = I stop the car
• opresc televizorul = I turn off the TV

You use a închide for something you close:

• închid ușa = I close the door
• închid fereastra = I close the window

So each verb matches the noun naturally.

Because Când termin is a subordinate clause placed before the main clause.

Romanian normally separates this kind of introductory clause with a comma:

• Când termin, voi opri aspiratorul și voi închide ușa.

This is similar to English:

• When I finish, I’ll turn off the vacuum cleaner and close the door.

If the order changes, punctuation may change too:

• Voi opri aspiratorul și voi închide ușa când termin.

That version is also correct, and now the time clause comes at the end.

A few sounds here are especially important for English speakers.

• când: the â is a central vowel that does not exist in English. It sounds somewhat like a deep, neutral uh, but with the tongue positioned differently. Also, â and î usually represent the same sound in modern Romanian.
• și: pronounced roughly like sh
  • a very short ee. So about shee, but shorter and lighter.
• ușa: pronounced roughly oo-sha.

A few letter notes:

• ș = sh
• ă = a short neutral vowel, like a quick uh
• â / î = a different central Romanian vowel, not exactly the same as ă

So:

• ușa ≈ OO-shuh
• și ≈ shee
• când has that special Romanian â

Yes. Romanian has more than one common way to talk about the future.

Besides:

• voi opri
• voi închide

you can also hear:

• o să opresc
• o să închid

So the sentence could be:

• Când termin, o să opresc aspiratorul și o să închid ușa.

In general:

• voi + infinitive is a standard, clear future form
• o să + present subjunctive form is very common in everyday speech

Both are correct. The voi future can feel a bit more straightforward or slightly more formal in some contexts, while o să is extremely common in conversation.

Yes. Termin comes from the infinitive a termina = to finish.

The -a is part of the infinitive form, not the conjugated present-tense form.

Conjugation:

• eu termin = I finish
• tu termini = you finish
• el/ea termină = he/she finishes
• noi terminăm = we finish
• voi terminați = you finish
• ei/ele termină = they finish

So in the sentence:

• Când termin = When I finish

That is simply the 1st person singular present form.

Yes. Romanian word order is fairly flexible, although some versions sound more neutral than others.

The original sentence:

• Când termin, voi opri aspiratorul și voi închide ușa.

A common alternative:

• Voi opri aspiratorul și voi închide ușa când termin.

Both are correct. The difference is mostly one of focus and rhythm:

• starting with Când termin emphasizes the time frame first
• putting când termin at the end makes the actions come first

The original version is very natural and clear.