I've been wondering about the different usages of しか and だけ.  
I understand that the first one emphasizes the feelings of the speaker,
negatively or positively. だけ is usually used with a positive verb (e.g.
氷菓が一つだけあります), and the inverse goes to しか (e.g. うちから学校まで10分しかかかりません).  
I also know that だけ can be used with negative verbs if the sentence attributes
a characteristic to something (e.g. 私たちの先生は日本人だけじゃない).

The question is, however, if I can use だけ with negative verbs even if the
sentence expresses an action (e.g. 明子だけに言いませんでした/明子にだけ言いませんでした).
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2018-12-16T00:10:05.907
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question
particle-だけ
Usage of だけ and しか