Two related of clauses of effort take a substantive clause of purpose with ut + subjunctive. They are classed under the general heading of such phrases that denote an action directed toward the future.
- I will give it my best shot so that you will be satisfied: huic optīmam operam dābō tibi gratum sīs.
- Let us attempt it now, to spare ourselves later pains: operam nunc dēmus ut postmodo onera vītēmus.
- I will chew this over tomorrow: huic negōtium dābō postrīdiē.
- Take care of this matter so that the plants do not die: huic negōtium dāte ne germina excīdant.
Note this alternative construction for operam dare.
- He made the effort for the sake of learning: operam dedit discēndō. (gerundive clause)
The Essential AG: 505, 505n1, 563