你昨天晚上忘了鎖門嗎？

Did you forget to lock the door last night?

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 昨天 zuótiān yesterday
3 晚上 wǎnshang
  1. evening
  2. night
  3. in the evening

classifier: 個
4 忘 wàng
  1. to forget
  2. to overlook
  3. to neglect
=5 了 le
  1. (completed action marker)
  2. (modal particle indicating change of state, situation now)
  3. (modal particle intensifying preceding clause)
=5 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)
=5 了 liǎo
  1. (of eyes) bright
  2. clear-sighted
  3. to understand clearly
=5 了 liào unofficial variant of 瞭 liào
6 鎖門 suǒmén to lock the door
=7 嗎 má (coll.) what?
=7 嗎 mǎ used in 吗啡 mǎfēi
=7 嗎 ma (question particle for "yes-no" questions)