汤姆本该往左转却往右转了。

Tom turned right when he should've turned left.

Source: Tatoeba

Sentence Composition

1 汤姆 Tāngmǔ Tom (name)
2 本该 běngāi should have … from the beginning
=3 往 wǎng
  1. to go (in a direction)
  2. to
  3. towards
  4. (of a train) bound for
  5. past
  6. previous
=3 往 wǎng old variant of 往 wǎng
4 左转 zuǒzhuǎn to turn left
=5 却 què old variant of 却 què
=5 却 què
  1. but
  2. yet
  3. however
  4. while
  5. to go back
  6. to decline
  7. to retreat
  8. nevertheless
  9. even though
=5 却 qū
  1. to catch
  2. to dispel
  3. to hold up with both hands
=6 往 wǎng
  1. to go (in a direction)
  2. to
  3. towards
  4. (of a train) bound for
  5. past
  6. previous
=6 往 wǎng old variant of 往 wǎng
7 右转 yòuzhuǎn to turn right
=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