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### An Alternative for Unfulfilled Past Actions

In the previous lesson, you learned to express "should have" and "could have" using the perfect conditional (*ar fi trebuit* / *ar fi putut*). Now, we will look at an advanced, yet very common alternative: using the **imperfect** form of the modal verb followed by the **past subjunctive**.

### Expressing "Should Have" (trebuia să fi)

To build this alternative structure for things that should have happened, use the imperfect form **trebuia** followed by the past subjunctive. 

The past subjunctive is incredibly simple: it is identical for every person! It is always formed with **să fi** plus the past participle of the main action verb.

Since **trebuia** is impersonal and the past subjunctive doesn't change, the entire verb block remains exactly the same whether it's "I", "you", or "they" doing the action.

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### Expressing "Could Have" (putea să fi)

To express what someone "could have" done, use the imperfect form of **a putea** (to be able to), followed by the same fixed past subjunctive (**să fi** + past participle).

Unlike *trebuia*, the imperfect form of *a putea* **does** change depending on who is doing the action (*eu puteam, tu puteai, el/ea putea, noi puteam, voi puteați, ei/ele puteau*).

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### Negation in the Past Subjunctive

To say someone should *not* have done something, you usually negate the past subjunctive itself by placing **nu** right after **să** (creating **să nu fi**).

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Unfulfilled past actions (trebuia să fi)

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 portal	portalul
temporal	temporal
the leap	saltul
You should have closed the temporal portal before the leap.	Tu trebuia să fi închis portalul temporal înainte de salt.
to alter	altera
the timeline	cronologia
They (fem.) could have altered the timeline and created a paradox.	Ele puteau să fi alterat cronologia și să fi creat un paradox.
to prevent (by hindering)	împiedica
the ramification	ramificația
Radu should have prevented these ramifications.	Radu trebuia să fi împiedicat aceste ramificații.
the existence	existența
parallel	paralel
Supposedly, they (fem.) could have saved the existence of the parallel universe.	Cică ele puteau să fi salvat existența universului paralel.
Do not alter the timeline! You should have prevented the first leap.	Nu alterați cronologia! Voi trebuia să fi împiedicat primul salt.
She could have explored the ramifications of the portal.	Ea putea să fi explorat ramificațiile portalului.
We should have chosen a parallel timeline.	Noi trebuia să fi ales o cronologie paralelă.
You could have altered the timeline, right?	Voi puteați să fi alterat cronologia, nu-i așa?
Existence in the parallel dimension should have been impossible.	Existența în dimensiunea paralelă trebuia să fi fost imposibilă.
Supposedly, the temporal tourist should have understood the ramifications.	Cică turistul temporal trebuia să fi înțeles ramificațiile.
Maria should have altered nothing to prevent the paradox.	Maria trebuia să nu fi alterat nimic pentru a împiedica paradoxul.
the anomaly	anomalia
You should have investigated the anomaly before making the jump.	Trebuia să fi investigat anomalia înainte să faci saltul.
the flow	fluxul
irreversible	ireversibil
He could have destroyed the temporal flow, and the effect was irreversible.	El putea să fi distrus fluxul temporal, iar efectul era ireversibil.
Could the anomaly have altered the temporal flow?	Oare anomalia putea să fi alterat fluxul temporal?
I had warned her that the change was irreversible, but she should have listened to me.	O avertizasem că schimbarea era ireversibilă, dar trebuia să mă fi ascultat.
Well, I erased it, but the flow should have continued.	Păi, l-am șters, dar fluxul trebuia să fi continuat.
to imagine	își imagina
I imagine a parallel universe without wars.	Îmi imaginez un univers paralel fără războaie.
You can't imagine what a paradox I created!	Nu-ți poți imagina ce paradox am creat!
Can you imagine what would have happened?	Îți imaginezi ce s-ar fi întâmplat?

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