Purpose clauses

Saying why something is done: ut or ne, a verb in the imperfect subjunctive, and a clause that answers the question "what for?"
Lesson 10.2The subjunctive

What a purpose clause does

A purpose clause tells you why someone does something. In English we usually say "to" or "in order to": the soldiers hurried to the city to save the citizens. Latin does it with a small clause of its own, introduced by ut and with its verb in the subjunctive.

milites ad urbem festinaverunt ut cives servarent.
ut opens the clause, servarent (imperfect subjunctive) closes it. Everything between them belongs to the purpose.

The clause answers "what for?". It is never a fact: the soldiers may or may not save anyone. That is why Latin uses the subjunctive, the mood for things wished, intended or imagined rather than things that happened.

  • ut introduces a positive purpose: "to", "so that".
  • ne introduces a negative purpose: "so that ... not", "in order not to". Latin never uses ut non for a purpose.
  • The verb of the clause is in the subjunctive and usually comes at the end of the clause.
  • se or suus inside the clause refers back to the subject of the main verb: servus tacuit ne dominus se puniret, "the slave kept quiet so that his master would not punish him" (the slave).

The verb: imperfect subjunctive

At GCSE the verb in a purpose clause is always in the imperfect subjunctive, because the stories you translate are told in the past. It is easy to form and easy to spot: take the present infinitive and add the personal endings.

1st2nd3rd4thsum
infinitiveportaremonereregereaudireesse
imperfect subjunctive, he / she / itportaretmoneretregeretaudiretesset
imperfect subjunctive, theyportarentmonerentregerentaudirentessent
Spotting it: if the verb looks like an infinitive with an ending stuck on (servare-t, fugere-nt, esse-t), it is the imperfect subjunctive. The imperfect indicative has -ba- instead (servabat, fugiebant, erat), and that is the one it is most often mixed up with.
Romani murum aedificaverunt ut urbem defenderent.
defenderent: infinitive defendere + -nt. The Romans are plural, so the ending is plural too.

Translating it

English has several ways to say the same thing. Any of these earns the mark, as long as the clause reads as a purpose.

  • to: ut cives servarent, "to save the citizens". The shortest, and usually the best.
  • in order to, so as to: the same, a little more formal.
  • so that ... might / could / would: use this when the person doing the purpose is not the subject of the main verb: nuntium misi ut tibi haec diceret, "I sent a messenger so that he might tell you this".
  • Negative, with ne: "so that ... would not", "in order not to", "to avoid ...ing".
servus tacuit ne dominus se puniret.
Different people, so "so that ... would not" reads better than "in order not to". se is the slave.
nuntium misi ut tibi haec diceret.
"To tell" is fine here as well, since it is obvious who does the telling.

Not to be confused with

ut has three other common jobs. The subjunctive and the signposts in the main clause tell them apart.

Looks like
How to tell
Translate
Result clause
tam fortis erat ut hostes fugerent
A signpost in the main clause: tam, tantus, tot, adeo, ita, sic. The negative is ut non, never ne.
"so ... that": he was so brave that the enemy fled.
Indirect command
dominus servo imperavit ut laboraret
A verb of ordering, asking or persuading before it: impero, rogo, persuadeo, moneo, oro.
"to": the master ordered the slave to work. The same English as a purpose, so either way of reading it is safe.
ut with the indicative
ut dixi, servus fugit
No subjunctive. The verb is an ordinary indicative.
"as" or "when": as I said, the slave ran away.
Purpose clause
servus fugit ut liber esset
No signpost, no verb of ordering, imperfect subjunctive. It answers "what for?"
"to", "in order to", "so that ... might": the slave fled to be free.

In the exam

Exam focus
  • Find ut or ne, then find the imperfect subjunctive that closes the clause. Translate the main clause first, then add the purpose.
  • "To" is a complete and correct translation of ut + subjunctive. Do not write "that" for a purpose clause: "the soldiers hurried that they save the citizens" loses the mark.
  • ne is not non. "ne ... puniret" is "so that he would not punish", and the "not" belongs to the clause, not to the main verb.
  • Check who se is. In a purpose clause it points back to the subject of the main verb.
  • In a comprehension question, "why did the soldiers hurry?" is almost always answered by the purpose clause. Quote the Latin from ut to the verb.

Try it

Two short exercises. Type your answer and it is marked against a mark scheme, phrase by phrase, so you can see which part of the sentence you have and which you have not. Nothing is saved.

Translate it

0 of 25 marks

Translate each sentence into English. Any natural wording earns the marks; the scheme is looking for the sense of each phrase.

1puella in horto manebat ut matrem videret.
2cives in muris manserunt ne hostes urbem intrarent.
3tam fortis erat ut hostes fugerent.
4pater filium ad urbem misit ut pecuniam peteret.
5ut dixi, servi iam fugerant.

Fill in the verb

0 of 5 marks

Type the imperfect subjunctive of the verb in brackets. Watch the ending: singular or plural?

1milites castra defendebant ut cives ___ (servo, servare).
2rex nuntium misit ut pacem ___ (peto, petere).
3servi tacebant ne dominus iratus ___ (sum, esse).
4ad forum festinavi ut amicum ___ (video, videre).
5puer ad villam cucurrit ut matrem ___ (moneo, monere).