你馬上出發，就可以趕上他們了。

Start right now, and you'll catch up with them.

Source: Tatoeba

Sentence Composition

=1 你 nǐ you (informal, as opposed to courteous 您 nín)
=1 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.)
2 馬上 mǎshàng
  1. at once
  2. right away
  3. immediately
  4. on horseback (i.e. by military force)
3 出發 chūfā
  1. to set off
  2. to start (on a journey)
4 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 ...
5 可以 kěyǐ
  1. can
  2. may
  3. possible
  4. able to
  5. not bad
  6. pretty good
6 趕上 gǎnshàng
  1. to keep up with
  2. to catch up with
  3. to overtake
  4. to chance upon
  5. in time for
7 他們 tāmen they; them
=8 了 le
  1. (completed action marker)
  2. (modal particle indicating change of state, situation now)
  3. (modal particle intensifying preceding clause)
=8 了 liǎo
  1. to finish
  2. (used with 得 dé or 不 bù after a verb to express (im)possibility, as in 忘不了 wàngbuliǎo "cannot forget")
  3. (literary) (usually followed by a negative such as 无 wú or 不 bù) completely (not); entirely (not); (not) in the least
  4. to understand clearly (variant of 了 liǎo)
=8 了 liǎo
  1. (of eyes) bright
  2. clear-sighted
  3. to understand clearly
=8 了 liào unofficial variant of 瞭 liào