如果你現在馬上出發，六時之前就可以到達。

If you start at once you'll arrive by six o'clock.

Source: Tatoeba

Sentence Composition

1 如果 rúguǒ
  1. if
  2. in case
  3. in the event that
=2 你 nǐ you (informal, as opposed to courteous 您 nín)
=2 你 nǐ you (Note: In Taiwan, 妳 is used to address females, but in mainland China, it is not commonly used. Instead, 你 is used to address both males and females.)
3 現在 xiànzài now; at present; currently
4 馬上 mǎshàng
  1. at once
  2. right away
  3. immediately
  4. on horseback (i.e. by military force)
5 出發 chūfā
  1. to set off
  2. to start (on a journey)
=6 六 liù
  1. six
  2. 6
=6 六 lù used in place names
=7 時 Shí surname Shi
=7 時 shí
  1. o'clock
  2. time
  3. when
  4. hour
  5. season
  6. period
8 之前 zhīqián
  1. before
  2. prior to
  3. ago
  4. previously
  5. beforehand
9 就 jiù
  1. (after a suppositional clause) in that case; then
  2. (after a clause of action) as soon as; immediately after
  3. (same as 就是 jiùshì) merely; nothing else but; simply; just; precisely; exactly
  4. only; as little as
  5. as much as; as many as
  6. to approach; to move towards
  7. to undertake; to engage in
  8. (often followed by 着 zhe) taking advantage of
  9. (of food) to go with
  10. with regard to; concerning
  11. (pattern: 就 jiù ... 也 yě ...) even if ... still ...
  12. (pattern: 不 bù ... 就 jiù ...) if not ... then must be ...
10 可以 kěyǐ
  1. can
  2. may
  3. possible
  4. able to
  5. not bad
  6. pretty good
11 到達 dàodá to reach; to arrive