Questions & Answers about Keisarin olisi täytynyt paeta.
How do we form the conditional perfect 'would have had to' in this sentence?
We use olisi, which is the conditional form of olla (to be), followed by täytynyt, the past participle of the necessity verb täytyä (must / to have to). Together, olisi täytynyt creates the conditional perfect meaning 'would have had to'.
Why is the subject Keisarin in the genitive case instead of the basic nominative Keisari?
The sentence uses the necessity verb täytyä. Verbs expressing necessity always require their subject to be in the genitive case (ending in -n). This rule applies no matter what tense or mood the verb is in, so even in the conditional perfect, the subject must be keisarin.
If the subject were plural ('the emperors'), would the verb change to olisivat täytyneet?
No, it would stay exactly the same: Keisarien olisi täytynyt paeta. Necessity verbs like täytyä are impersonal and only ever used in the third-person singular form. Because of this, both the auxiliary verb olisi and the participle täytynyt remain singular, even with a plural subject.
Why is the verb paeta in its basic dictionary form?
When you use a necessity verb construction like täytyä, the action that must be done is always expressed in the first infinitive (the dictionary form). Here, paeta (a type 6 verb meaning 'to escape') directly follows the necessity verb chain.
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