Tom會游泳，但Mary卻不會。

Tom can swim, but Mary can't.

Source: Tatoeba

Sentence Composition

1 T T (slang) butch (lesbian stereotype)
2
o
Not in lexicon.
3
m
Not in lexicon.
=4 會 huì
  1. can; to have the skill; to know how to
  2. to be likely to; to be sure to
  3. to meet; to get together
  4. meeting; gathering
  5. (suffix) union; group; association
  6. (bound form) a moment (Taiwan pr. huǐ)
=4 會 kuài (bound form) to reckon accounts
=4 會 kuò only used in 會撮／会撮
=5 游泳 yóuyǒng
  1. swimming
  2. to swim
=5 游泳 yóuyǒng misspelling of 游泳 (yóuyǒng)
6 但 dàn
  1. but; yet; however; still
  2. merely; only; just
7
M
Not in lexicon.
8
a
Not in lexicon.
9
r
Not in lexicon.
10
y
Not in lexicon.
11 卻 què
  1. but
  2. yet
  3. however
  4. while
  5. to go back
  6. to decline
  7. to retreat
  8. nevertheless
  9. even though
12 不會 bùhuì
  1. improbable
  2. unlikely
  3. will not (act, happen etc)
  4. not able
  5. not having learned to do sth
  6. (coll.) (Tw) don't mention it
  7. not at all