I'm French, but I think in English they're called prefix, radical and suffix. Prefix is anything you put before the radical, the radical is the "root" (what you will always find in a conjugated verb) and the suffix is what comes after the radical =)
The three principal parts of verbs are.
Base form
participle
past
past participle
Finite and non-finite verbs and transitiveand intransitive verbs are the four parts of verbs.
past tense
The five principal parts of a verb are: Infinitive, Present, Past, Present Participle, Past Participle.
past tense future tense present tense
an action
sink sank sunk
Verb Form
Conjugation in English is regular in all but a few verbs. Problems are usually in the principal parts. Principal parts of to awake ( a weakened, intransitive form of to awaken) are: awake, awaking, awoke, awoken. Awaked is rare.
It depends on whether the teacher and the principal are two different individuals or a single individual (which happens in some schools where principal happens also to be an active teacher). If teacher and principal are two separate individuals, then the verb form would be 'are'. If it is the same person who is the teacher and the principal, then the verb should be 'is'. Hope that suffices.
verb Here shopping is an auxuliary verb to the principal verb went.
tense
one
The principal parts of a verb are the forms of the verb that you need to know in order to derive all the verb's possible forms. For "sing" these are:present tense: singpast tense: sangpast participle: sung
base form of the verb combined with different auxiliary verbs or helping verbs, such as "be," "do," and "have," as well as different verb endings to indicate the time of the action (past, present, future). These combinations create the various verb tenses in English.
sink sank sunk
The principal parts of verbs are typically the base form (infinitive), past tense, past participle, and present participle.
Verb Form
In the sentence, "Earlier, I helped the principal." the verb is "helped."
It depends on the language. Most modern European languages have two priciple parts; some languages, such as Classical Greek have six.
Conjugation in English is regular in all but a few verbs. Problems are usually in the principal parts. Principal parts of to awake ( a weakened, intransitive form of to awaken) are: awake, awaking, awoke, awoken. Awaked is rare.
there is no verb
The principal parts of "throw" are throw, threw, thrown.