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### Expressing "Should Have"

To talk about things that should have happened but didn't, Romanian uses the perfect conditional of **a trebui** (to have to) followed by **să** and the present subjunctive of the main action verb. 

Because **a trebui** is impersonal in this specific usage, it stays fixed as **ar fi trebuit** regardless of who the subject is. The verb following **să**, however, changes to match who "should have" done the action. Let's look at some examples involving unidentified flying objects (**OZN-ul**).

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### Expressing "Could Have"

To express what someone "could have" done (unfulfilled past ability), use the perfect conditional of **a putea** (to be able to) followed by **să** and the present subjunctive.

Unlike *a trebui*, *a putea* changes its helper verb depending on who is doing the action. For the third person (he/she/it/they), it takes the form **ar fi putut**.

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### Negation and Complex Scenarios

Making these past modals negative is simple: place **nu** directly before the conditional helper verb, resulting in **nu ar fi trebuit** (shouldn't have) or **nu ar fi putut** (couldn't have).

These structures are perfect for discussing prevented disasters, mistakes, or things that went wrong—such as extraterrestrial abductions (**a răpi**) or an impending invasion (**invazia**).

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Unfulfilled past modals (ar fi trebuit să)

adjective

adverb

adverbial phrase

auxiliary

auxiliary verb

conjunction

determiner

interjection

noun

numeral

particle

preposition

pronoun

sentence

verb

The verb to be and definite articles (a fi, -ul, -le)

Feminine definite articles (-a, -ua)

Indefinite articles (un, o)

Negative sentences (nu)

Question words (ce, unde, cine)

The verb to have (a avea)

Masculine plural nouns (-i, -ii)

Feminine plural nouns (-e, -i, -le)

Neuter plural nouns (-uri, -e, -le)

Adjectives and agreement

Present tense of regular -a verbs

Present tense of -a verbs with suffix (-ez)

Present tense of regular -i and -î verbs

Present tense of -i and -î verbs with suffix (-esc / -ăsc)

Present tense of -ea and -e verbs

Reflexive pronouns (mă, te, se, ne, vă)

Accusative prepositions (în, la, pe, din, cu)

Likes and dislikes (îmi place)

Possessive adjectives (meu, tău, său)

Third-person possessives (lui, ei, lor)

Possessive articles (al, a, ai, ale)

Formal politeness (dumneavoastră)

Demonstrative adjectives (acest, acel)

Numbers 1 to 10

The number two (doi, două)

Numbers 11 to 20

Counting by tens to 100

Quantifying large numbers (de)

The subjunctive (să)

Third-person subjunctive (să)

Direct object pronouns (îl, o, îi, le)

Personal direct objects (pe)

Days of the week

Telling time (e ora...)

Months of the Year (January to June)

Months of the Year (July to December)

The Four Seasons

Weather Conditions

Rooms in a House

Basic Body Parts: Upper Body

Basic Body Parts: Limbs

Everyday Clothing

Basic Foods: Groceries

Fruits and Vegetables

Around Town

Getting Around

Setting the Table

A Colorful World

Common Animals

In the Wild

Jobs and Careers

Everyday Tech

Describing people (tânăr, bătrân, înalt)

Asking when and why (când, de ce, care)

Hello and goodbye (bună ziua, la revedere)

Coming and going (intra, sta, trece)

Where is it? (sub, lângă, între)

Knowing and thinking (știu că, cred că)

Sorry, welcome, congratulations (îmi pare rău, la mulți ani)

Introducing yourself (mă numesc, sunt din România)

How much and how many (puțin, prea, doar)

Can and may (pot merge, pot să merg)

If and whether (dacă)

At school and university

Irregular verbs in the present (vrea, lua, da, bea, sta)

Free time and sport

How much is it? (cât costă, câți, câte)

Before and after (înainte, după, până)

At the doctor (mă doare)

Meals of the day (micul dejun, prânzul, cina)

At the restaurant

Ability and permission (a putea să)

Obligation and necessity (trebuie să)

Desires and intentions (a vrea să)

Impersonal statements (se)

Adverbs of frequency (adesea, uneori)

Conjunctions for reasons and links (pentru că, deci)

Stressed accusative pronouns (pe mine, pe tine)

Indefinite pronouns (cineva, ceva)

Negative pronouns and double negation (nimeni, nimic)

The past tense auxiliary (am, ai, a)

The past tense (am, ai, a)

Regular past participles (-at, -it)

Regular past participles (-ut, -s, -t)

Negative past tense (nu am)

Question	Answer
the UFO	OZN-ul
the radar	radarul
We should have seen the UFO on our radar.	Ar fi trebuit să vedem OZN-ul pe radarul nostru.
military	militar
the alien	extraterestrul
The military man could have caught the alien yesterday.	Militarul ar fi putut să prindă extraterestrul ieri.
flying	zburător
The flying saucer should have landed here.	Farfuria zburătoare ar fi trebuit să aterizeze aici.
the ship (vessel)	nava
the galaxy	galaxia
Their ship could have destroyed the whole galaxy.	Nava lor ar fi putut să distrugă toată galaxia.
to abduct	răpi
The alien shouldn't have abducted anyone.	Extraterestrul nu ar fi trebuit să răpească pe nimeni.
the invasion	invazia
The invasion could have been more and more dangerous.	Invazia ar fi putut să fie din ce în ce mai periculoasă.
the base	baza
We should have returned to the military base, but the radar broke down.	Ar fi trebuit să ne întoarcem la baza militară, dar radarul s-a stricat.
That UFO could have abducted you last night.	Acel OZN ar fi putut să te răpească azi-noapte.
Our military base should have stopped the invasion.	Baza noastră militară ar fi trebuit să oprească invazia.
They thought that the flying ship could have saved the galaxy.	Ele au crezut că nava zburătoare ar fi putut să salveze galaxia.
They shouldn't have hidden anything about the alien that abducted her.	Nu ar fi trebuit să ascundă nimic despre extraterestrul care a răpit-o.
The UFO could have become brighter and brighter.	OZN-ul ar fi putut să devină din ce în ce mai luminos.
the commander	comandantul
The commander should have warned us.	Comandantul ar fi trebuit să ne avertizeze.
the bomb	bomba
The commander shouldn't have left the bomb here.	Comandantul nu ar fi trebuit să lase bomba aici.
The bomb could have destroyed the whole base.	Bomba ar fi putut să distrugă toată baza.
The soldiers found a bomb near the radar.	Soldații au găsit o bombă lângă radar.
armed	armat
The armed soldiers could have defended the base.	Soldații armați ar fi putut să apere baza.
The alien was armed and very dangerous.	Extraterestrul era armat și foarte periculos.
The commander wasn't armed when the ship arrived.	Comandantul nu era armat când a sosit nava.

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