Exercise 5. Verb forms change for the PRESENT, PAST, or FUTURE. Not all verbs are regular in this. Most dictionaries have lists of irregular verbs. The lists show the first, second, andthirdform of irregular verbs.
Our earthly space is three-dimensional. Language grammar belongs with the estimable lengths, heights, and widths, along with the human need for water, air, good clothing and roofing. Grammar is a basic human need. It is healthy to have a good business with grammar.