The most common word in the english language?
No context provided
The most common of all wordw in the english language?
the
A list of 100 words that occur most frequently in written English is given below, based on an analysis of the Oxford English Corpus (a collection of texts in the English language, comprising over 2 billion running words). A part of speech is provided for most of the words, but part of speech categories vary between analyses, and not all possibilities are listed. For example, "I" may be a pronoun or a Roman numeral; "to" may be a preposition or an infinitive marker; "time" may be a noun or a verb. Also, a single spelling can represent more than one root word. For example, "singer" may be a form of either "sing" or "singe". Different corpora may treat such difference differently. 
The most common noun in the english language?
time
Most common words in English
No context provided
The most common verb in the english language?
be
No context provided
The most common adjective in the english language?
good
No context provided
The most common preposition in the english language?
to
Most common words in English
https://en.wikipedia.org/wiki/Most%20common%20words%20in%20English
Studies that estimate and rank the most common words in English examine texts written in English.
Most common words in English
Studies that estimate and rank the most common words in English examine texts written in English. The most common of all words in the English language is "the". The most common noun is "time" and the most common verb is "be". The most common adjective is "good" and the most common preposition is "to".