The meanings of the four verbs were similar enough that, over the millennia, their forms became braided together. Their origins can be traced back to their Indo-European roots in The American Heritage Dictionary . Their cognates- related words that derived over time from the same source word can also be traced. The cognates form a set of fascinating word families. Some of the word's cognates are husband, booth, build, future, neighbor, beam, physics, phylum , and boodle .
Some cognates are yes, soothe, sin, essence, absent, interest, present, and proud.
Some cognates are earnest, orient, origin, abort, art , and hormone . All three uses are so common, forms of be are everywhere. We use be as the main verb in our sentences all the time. In writing, overuse of it can deaden our style. We should try to substitute other verbs.