Deictic expressions relate the content of an utterance to the speaker, the addressee, and the time and place of utterance. The deixis is a term for a word or phrase which directly relates an utterance to a time, place, or person(s). In the sentence “I'm busy now so you can't do that here. Come back tomorrow”, there are many different types of deixis. For example, person deixis refers to forms used to point to people, such as “I” and “you”. Spatial deixis refers to forms used to point to location, such as “here”.Temporal deixis refers to forms used to point to location in time, e.g. “now” and“tomorrow” Social deixis refers to forms used to indicate relative social status.

本题考查指示词。 首先解释指示词的含义及功能， 然后结合所给句子对指示词进行分析。