What principal part is the main verb?
The puppy is tearing his toy into many pieces.
A.
past
B.
present participle
C.
present
D.
past participle
The main verb is tearing.
What part do you think it is?
Wh
http://grammar.about.com/od/mo/g/Main-Verb.htm
To determine the principal part of the main verb in the sentence, we need to identify the main verb first. In this sentence, the main verb is "tearing." Now, we can identify the principal part of the verb.
The principal parts of a verb are the base form, present participle, past form, and past participle. In this case, "tearing" is the present participle form of the verb "tear." The base form is "tear," the past form is "tore," and the past participle is "torn."
Therefore, the principal part of the main verb "tearing" in the sentence "The puppy is tearing his toy into many pieces" is the present participle. So the answer is B. present participle.