How many forms of English expressions are there in a ****?

There are 16 tenses in English ****, divided into general present tense (do), general past tense (did), general future tense (will do), present progressive tense (is/am/are doing), past progressive tense (was/were doing), future progressive tense (which can be exchanged with the general future tense, will be doing), present The past tense (was/were doing), the future tense (can be exchanged with the general future tense, will be doing), the present perfect tense (have/has done).

Past perfect (had done), which occurs before the action in the general past tense), future perfect (will have done), present perfect (have/has been doing), past perfect (had been doing), future perfect (will have been doing), past perfect (will have been doing), past perfect (will have been doing), past perfect (will have been doing). doing), past future tense (would do), past future progressive tense (would be doing), past future perfect tense (would have done), past future perfect progressive tense (would have been doing) and so on.

Expanded material:

Tense is a verb form, and different tenses are used to express different times and ways. It is a verb form that expresses behavior, action, and state in various time conditions, and there are 16 tenses in English.

In grammar, tense or tense indicates the relationship between the time when the behavior occurs and when it is spoken. They are generally categorized as past, present, or future tenses, and are usually used in conjunction with the progressive and perfect tenses, which indicate the progress or termination of an action.

Tense, together with tone, inflection, style and person, are the five grammatical characteristics that a verb form may exhibit.

Some languages, such as analytic Chinese, do not use tense, but still have temporal adverbs to assist when necessary. Other languages, such as Japanese, have verb-like tense properties, where adjectives change form to convey temporal information. Still other languages, such as Russian, have a single word that expresses both tense and physical appearance.

Reference:

Baidu Encyclopedia - English Tenses in Detail