We have already seen that the main tenses of a verb are the present, the past and the past participle. All other tenses are formed from these three forms.
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Intransitive verbs do not have objects:
The baby cried.
In the example sentences given above the intransitive verbs cried and slept have no objects, but the sentences still make complete sense.
The word mood is derived from the Latin word ‘modus’ which means mode or manner. Hence the mood of a verb shows the mode or manner in which the action expressed by the verb takes place.
The simple future tense is used to talk about an action or event which is yet to take place. Sentences in this tense have the following structure:
The simple past tense expresses a past action or event the time of which may or may not be indicated.
Sentences in this tense have the following structure:
Present continuous tense
Sentences in the present continuous tense have the following structure:
Subject + is/am/are + -ing form of the verb
In order to change an affirmative sentence in the simple present tense into a negative sentence, we use do not or does not before the principal verb. Note that do is used with I, you and plural subjects. Does is used with singular subjects.