参考答案：Locutionary act refers to the act of uttering words， phrases， and clauses. It is the act of conveying literal meaning by means of syntax， lexicon and phonology. For example， by saying “You have left the door wide open”，the locutionary act performed by the speaker is that he has uttered all the words and expressed what the words literally mean.
When children learn to distinguish between the sounds of their language and the sounds that are not part of the language， they can acquire any sounds in their native language once their parents teach them.
Language reflects sexism in society. Language itself is not sexist， just as it is not obscene; but it can connote sexist attitudes as well as attitudes about social taboos or racism.
An important difference between presupposition and entailment is that presupposition，unlike entailment，is not vulnerable to negation. That is to say, if a sentence is negated, the original presupposition is still true.
Linguistic forms having the same sense may have different references in different situations while linguistic forms with the same reference always have the same sense.
