The time range and significance of sixteen tenses in English. The shorter the better!

The simple present tense refers to this moment in time, which has been used for scientific knowledge. General present tense do\be generally refers to the past. Did\was generally refers to the future. Be to\will do will generally refer to the past. Future tense, present continuous tense. It can also be used to mean "I'm going to be a good person now." . . "Being in the past continuous tense is going on at some point in the past, and it can also be used to mean" I plan to be in the past. " . . "Was\were doing in the future" is going on at some time in the future, and it can also be used to mean "I plan to do it in the future". " .。" Will have done \ Be to be \ has been completed in the past with the present perfect tense, which may have an impact on the present. What has been done in the past has been completed in the past perfect tense, which may have an impact on the past. The future perfect may have been completed in the future. Will have an impact on the present The past has begun and continued into the past, having an impact on the past. The past has begun and continues to the present, which has an impact on the present. What you have been doing in the future will be done in the future. The past will be done in the future. The past will be done in the future. What happened in the past will continue to the present and may have an impact on the present.