What are the symbolic words of the present perfect tense?

The present perfect tense is used to indicate that an action started at a certain point in time in the past and continues until the present. The symbolic words of the present perfect tense include: 1 have/has -means to have or have For example:I have a book 2 been -means "have done something in the past" For example:I have been to Paris 3 been+ present verb-meaning "from a certain point in the past until now" For example:I have been learning English for five years 4 doing -means "doing something" For example:I am doing my homework have+ ever+ done something For example:I have ever read a book before These words can be used to indicate the effect of past actions on the present or to describe the continuation of a state.