资料来源 : pyDict

文法上

资料来源 : Webster's Revised Unabridged Dictionary (1913)

Grammatical \Gram*mat"ic*al\, a. [L. grammaticus, grammaticalis;
   Gr. ? skilled in grammar, knowing one's letters, from ? a
   letter: cf. F. grammatical. See {Grammar}.]
   1. Of or pertaining to grammar; of the nature of grammar; as,
      a grammatical rule.

   2. According to the rules of grammar; grammatically correct;
      as, the sentence is not grammatical; the construction is
      not grammatical. --{Gram*mat"ic*al*ly}, adv. --
      {Gram*mat"ic*al*ness}, n.

资料来源 : WordNet®

grammatically
     adv : in a grammatical manner; "this child already speaks
           grammatically" [ant: {ungrammatically}]