French Verb Conjugations
| Present | Imperfect | Future | Conditional | Subjunctive | Imperfect subj. | |||
| je | perturbe | perturbais | perturberai | perturberais | perturbe | perturbasse | ||
| tu | perturbes | perturbais | perturberas | perturberais | perturbes | perturbasses | ||
| il | perturbe | perturbait | perturbera | perturberait | perturbe | perturbât | ||
| nous | perturbons | perturbions | perturberons | perturberions | perturbions | perturbassions | ||
| vous | perturbez | perturbiez | perturberez | perturberiez | perturbiez | perturbassiez | ||
| ils | perturbent | perturbaient | perturberont | perturberaient | perturbent | perturbassent | ||
| Passé composé | Past perfect | Future perfect | Past conditional | Past subjunctive | Pluperfect subj. | |||
| j’ | ai perturbé | avais perturbé | aurai perturbé | aurais perturbé | aie perturbé | eusse perturbé | ||
| tu | as perturbé | avais perturbé | auras perturbé | aurais perturbé | aies perturbé | eusses perturbé | ||
| il | a perturbé | avait perturbé | aura perturbé | aurait perturbé | ait perturbé | eût perturbé | ||
| nous | avons perturbé | avions perturbé | aurons perturbé | aurions perturbé | ayons perturbé | eussions perturbé | ||
| vous | avez perturbé | aviez perturbé | aurez perturbé | auriez perturbé | ayez perturbé | eussiez perturbé | ||
| ils | ont perturbé | avaient perturbé | auront perturbé | auraient perturbé | aient perturbé | eussent perturbé | ||
| Passé simple | Past anterior | Imperative | Participles | |||||
| je / j’ | perturbai | eus perturbé | (tu) | perturbe | Present | perturbant | ||
| tu | perturbas | eus perturbé | (nous) | perturbons | Past | perturbé | ||
| il | perturba | eut perturbé | (vous) | perturbez | Perfect | ayant perturbé | ||
| nous | perturbâmes | eûmes perturbé | Past imperative | |||||
| vous | perturbâtes | eûtes perturbé | (tu) | aie perturbé | Past infinitive | |||
| ils | perturbèrent | eurent perturbé | (nous) | ayons perturbé | avoir perturbé | |||
| (vous) | ayez perturbé | |||||||
Perturber is a regular -er verb.

Subordinating conjunctions connect two unequal clauses: a main clause and a dependent or subordinate clause.

The Subjunctivisor is an interactive tool that will advise you on whether to use the subjunctive or indicative with more than 275 French verbs, expressions, and conjunctions.
Knowing whether to use the passé composé or imparfait is particularly difficult when translating certain verbs into French. Very broadly speaking, the imperfect is equivalent to was/were + ___ing, but some English verbs are not often used in this form. So when translating was, had, and liked into French, you have to think about the meaning in order to decide which tense to use.