The spelling of "hast being" can be explained using the International Phonetic Alphabet (IPA). "Hast" is pronounced /hæst/, with the "a" pronounced as in "cat". The "b" in "being" is silent and the word is pronounced /ˈbiːɪŋ/. "Hast being" is an archaic term used in Shakespearean English to mean "having existence". While it may seem confusing to modern readers, understanding the IPA can help make the spelling and pronunciation of these old words clearer.
The phrase "hast being" is an archaic form of the present participle of the verb "to have". The etymology of "hast" can be traced back to Old English, where it was formed by combining the root form "habban" (to have) with the second-person singular present indicative ending "-st". In Old English, "hast" was used to express the second-person singular present tense, meaning "you have". On the other hand, "being" comes from Old English "bēon", which means "to be" and has undergone various inflectional changes throughout history, leading to its present form.