"QI lupej jaghpu'."
Translation:The enemies will demolish the bridge.
No, it doesn't need one.
Most syllables are CVC (consonant–vowel–consonant), but syllables can also end in -w', -y', -rgh or in no consonant at all.
Other examples of CV words are Do "velocity", bo "feather", and Da "act like"; examples of words that contain a CV syllable are DIvI' "federation", Ha'DIbaH "animal; meat", and SIbI' "immediately".
For "are demolishing" we would expect lupejtaH. There are situations where "are demolishing" would be an appropriate translation even without the -taH, but we ask that in this course you only use them together. So without -taH the present tense translation would be "The enemies demolish the bridge."