As defined in the previous chapter of verb copulas or copulative sentences can be defined as follows;
Copulas are; be, is, am, are, seem, taste etc. in copulative sentences copulas are used alone with no main verb with them because they are not showing action. Be-form acts as copula as mentioned already but you must know that when it is used in continuous tenses along with main verb (present participle) they cease to be copulas because there they are showing action. First form of copulatives are used in present tense whereas in past tense second form or past form is used. like;
In the following examples you will see that copulas which are underlined and italicized are not going to show any action.
For future, as defined thoroughly in previous chapters of tenses, we have to use will or shall otherwise in English language verb alone doesn’t stand for future. If you go back to tenses you will see only present form of the verb which is used with will or shall and in this case present and the most basic form of copulas is be which shall be used in future situations.
In copulatives we see be-form is mostly used but in case of seem, look and taste they also act like be-form and don’t show any action. It can be seen in the following examples where they are replaced by be-form and still sentence stands as copulative where there is no action, subject is not actor and predicative complement is used instead of object.
Some other very simple non-copulative form of sentences are the ones with have and its inflectional forms (has, had) as only auxiliary, like;