infinitive constructions

Question 1

Which phrase means ‘in order to’?

Answer 1

Um … zu …

Um diesen Satz zu verstehen, muss man Deutsch sprechen können

(In order to understand this sentence, you must be able to speak German)

Question 2

Which phrase means ‘without’?

Answer 2

Ohne … zu …

Sie kann nicht verlassen ohne ihn zu küssen

(She can’t leave without kissing him)

Question 3

I am trying to write the best sentence in the world.

Answer 3

Ich verstuhe den besten Satz in der welt zu schreiben

If the first verb is a modal verb, the zu before the 2nd verb (infinitive) is not required, otherwise it is