absolute tense in a sentence

1. Most simple sentences in tensed languages exhibit absolute tense.
2. It is common to regard English perfect forms as combinations of perfect aspect with absolute tense.
3. In some cases, the operation of sequence of tenses in indirect speech serves to preserve absolute tense.
4. An example of a normally absolute tense being used relatively, in English, is provided by indirect speech placed in the future.
5. Hodiernal tenses refer to events of today ( in an absolute tense system ) or of the day under consideration ( in a relative tense system ).
6. It's difficult to find absolute tense in a sentence.
7. Hesternal tense refers to an event which occurred yesterday ( in an absolute tense system ) or on the preceding day ( in a relative tense system ).
8. Crastinal tense refers to an event which will occur tomorrow ( in an absolute tense system ) or the following day ( in a relative tense system ).
9. The same is found in some languages even in past indirect speech ( where English tends to preserve absolute tense or use absolute-relative tense, as described in the previous and following sections ).
10. The reference point could be the time of utterance, in which case the verb expresses absolute tense, or it could be a past, present, or future time of reference previously established in the sentence, in which case the verb expresses relative tense.
11. So, for example, in English we say that " he decided that he would go yesterday "-' will go'has to be in the past ('would go') because his departure is in the past . ( In contrast, we'd say " he decided that he will go tomorrow . " This is called'absolute tense'. ) If English had relative tense, we'd say " he decided that he will go yesterday ", because at the time he made his decision, his departure was still in the future.