你昨天早上在打网球吗？

Were you playing tennis yesterday morning?

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 早上 zǎoshang early morning

classifier: 個
4 在 zài
  1. to exist; to be alive
  2. (of sb or sth) to be (located) at
  3. (used before a verb to indicate an action in progress)
5 打网 dǎwǎng
  1. to net sth
  2. to catch sth with a net
=6 球 qiú ball used for playing games (variant of 球 qiú)
=6 球 qiú
  1. ball
  2. sphere
  3. globe
  4. ball game
  5. match

classifiers: 個, 場
=7 吗 má (coll.) what?
=7 吗 mǎ used in 吗啡 mǎfēi
=7 吗 ma (question particle for "yes-no" questions)