True, to make a sentence in English, it should both include a subject and predicate. In the sentence, ‘I am’, ‘I’ is subject and ‘am’ is a predicate and also expresses a complete thought. Thus, ‘I am’ is the shortest sentence in English.True, to make a sentence in English, it should both include a subject and predicate. In the sentence, ‘I am’, ‘I’ is subject and ‘am’ is a predicate and also expresses a complete thought. Thus, ‘I am’ is the shortest sentence in English.