Impersonal Expressions of Necessity
When establishing rules, Farsi frequently uses impersonal expressions to say "it is necessary that" or "one needs to."
The two most common are:
- لازم است (it is necessary)
- ضروری است (it is essential / necessary)
Connect these phrases to the required action with the conjunction که (that). The verb in the dependent clause must be in the Present Subjunctive.
لازم است / ضروری است + که + [Present Subjunctive]
| It is necessary for the beekeeper to send smoke towards the hives. | ضروری است که زنبوردار به سوی کندوها دود بفرستد.zaruri ast ke zanburdâr be su-ye kanduhâ dud beferestad. |
As usual, subject pronouns can be omitted since the verb ending indicates who performs the action.
| When approaching the hive, it is necessary to wear a net hat. | وقتی که به کندو نزدیک میشوید، لازم است که کلاه توری بپوشید.vaghti ke be kandu nazdik mishavid, lâzem ast ke kolâh turi bepushid. |
| It is necessary for the beekeeper to find the queen in the hive. | لازم است که زنبوردار ملکه را در کندو پیدا کند.lâzem ast ke zanburdâr malake râ dar kandu peydâ konad. |
These expressions pair well with تا (so that) to explain why a rule is necessary. Both the required action and the result clause take the subjunctive mood.
| It is necessary to move slowly so that the bees do not sting you. | لازم است که آرام حرکت کنید تا زنبورها شما را نیش نزنند.lâzem ast ke ârâm harekat konid tâ zanburhâ shomâ râ nish nazanand |
For compound verbs, the subjunctive prefix بـ goes only on the verbal part. If the verb is negative, the negative prefix نـ replaces it.
| After a sting, it is necessary to rub ointment on your own skin. | بعد از نیش، لازم است که روی پوست خودتان پماد بمالید.ba'd az nish, lâzem ast ke ruye pust khodetân pomâd bemâlid. |
| It is necessary for the beekeeper to harvest the honey in the summer. | ضروری است که زنبوردار عسل را در تابستان برداشت کند.zaruri ast ke zanburdâr asal râ dar tâbestân bardâsht konad. |
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