Declarative, interrogative and imperative sentences. According to Types of Communication
(1) Declarative
(2) Interrogative
(3) Imperative
Sentences belonging to the several types differ from each other in some grammatical points, too. Thus, interrogative sentences are characterized by a special word order. In interrogative sentences very few modal words are used, as the meanings of some modal words are incompatible with the meaning of an interrogative sentence. It is clear that modal words expressing full certainty, such as certainly, surely, naturally, etc., cannot appear in a sentence expressing a question. On the other hand, the modal word indeed, with its peculiar shades of meaning, is quite possible in interrogative sentences, for instance, ‘Isn't so indeed?’
There are also sentences which might be termed semi-interrogative. Oh, you've seen him? is half-way between the affirmative declarative sentence, You have seen him, and the interrogative sentence, Have you seen him? From, the syntactical viewpoint, the sentence is declarative, as the mutual position of subject and predicate is, you have seen, not have you seen, which would be the interrogative order. In what way or ways does it, then, differ from a usual declarative sentence? That is where the question of the intonation comes in. Whether the question mark at the end of the sentence does or does not mean that the intonation is not that typical of a declarative sentence, is hard to tell, though it would rather seem that it does.
Imperative sentences also show marked peculiarities in the use of modal words. It is quite evident, for example, that modal words expressing possibility, such as perhaps, maybe, possibly, are incompatible with the notion of order or request. Indeed, modal words are hardly used at all in imperative sentences.
The notion of exclamatory sentences and their relation to the three established types of declarative, interrogative, and imperative sentences presents some difficulty. It would seem that the best way to deal with it is this. On the one hand, every sentence, whether narrative, interrogative, or imperative, may be exclamatory at the same time, that is, it may convey the speaker's feelings and be characterized by emphatic intonation and by an exclamation mark in writing. This may be seen in the following examples: But he can't do anything to you! (R. WEST) What can he possibly do to you! (Idem) Scarlett, spare me!
On the other hand, a sentence may be purely exclamatory, that is, it may not belong to any of the three types classed above. This would be the case in the following examples: "Well, fiddle-dee-dee!" said ScarlettOh, for God's sake, Henry!
However, it would perhaps be better to use different terms for sentences which are purely exclamatory, and thus constitute a special type, and those which add an emotional element to their basic quality, which is either declarative, or interrogative, or imperative. If this view is endorsed, we should have our classification of sentences according to type of communication thus modified:
(1) Declarative (including emotional ones)
(2) Interrogative (including emotional ones)
(3) Imperative (including emotional ones)
(4) Exclamatory
This view would avoid the awkward contradiction of exclamatory sentences constituting a special type and belonging to the first three types at the same time.
Types of object.
Object is a secondary part of the sentence expressed by a verb, a noun, a substantival pronoun, an adjective, a numeral, or an adverb, and denoting a thing to which the action passes on, which is a result of the action, in reference to which an action is committed or a property is manifested, or denoting an action as object of another action.
Classification of object:
1.Prepositional and non-prepositional objects
2.Morphological types (noun, pronoun, substantivized adjective, infinitive, gerund)
3.Direct/indirect, is applied only to objects expressed by nouns or pronouns. There are sentences in which the predicate is expressed by the verbs send, show, lend, give. These verbs usually take 2 different kinds of objects simultaneously: (1) an object expressing the thing which is sent, shown, lent, given, etc. (2) the person or persons to whom the thing is sent, shown, lent, given, etc.
The difference between the 2 relations is clear enough: the direct object denotes the thing immediately affected by the action denoted by the predicate verb, whereas the indirect object expresses the person towards whom the thing is moved, e.g. We sent them a present. The indirect object stands 1st, the direct object comes after it. In studying different kinds of objects it is also essential to take into account the possibility of the corresponding passive construction.