A sentence is made up of a word or a group of words with complete meaning. Those sentences that can be separated into two members or parts are bimembered.
The term bimember is formed by the prefix bi, which means two, and membre, which means member. Thus, one member of the sentence is the subject and the other is the predicate.
The subject and predicate
The subject is what names an object, a person or an animal that performs some type of action. The subject head is always a noun. The predicate is what is said about the subject and its nucleus is always a verb. In the sentence “Grandpa needs love”, the subject is formed by “grandfather” and the predicate is formed by “needs love”. Since this sentence can be separated into two members, it is a bimembered sentence.
The subject and the predicate must agree in gender and number. In the sentence “stories present mysteries”, the subject part and the predicate part coincide in gender and number.
When it is not possible to separate the subject and the predicate, we are not dealing with a two-membered sentence, but rather a single-membered sentence.
If I say “Street Stories” I am not dealing with a two-membered sentence, since there is no verb in it.
However, in sentences with climatological verbs, there is a verb but in spite of this they are the same (for example “It was raining intensely” or “It was snowing heavily”).
Other ways to classify sentences
The distinction between two-membered and one-membered is a way of classifying sentences. However, there are other types of classification. Thus, there are simple or compound sentences. In the former there is only one verbal form and in the latter there is more than one verbal form.
Depending on the attitude of the speaker, we can have declarative sentences (It’s already five o’clock), exclamatory (I’m afraid), interrogative (Tell me why you did it), imperative (Do it immediately), desiderative (I hope he comes as soon as possible) or doubtful ( I don’t know why you’re so worried.)
They can also be divided into transitive (on Monday we will eat at my house) or intransitive (I will take the boxes down to the storage room), reflexive (Manuel painted his face) or reciprocal (they get along very well).
In the sentence “on Saturday we will eat together” it can be seen that it is a simple, bimembered, declarative and intransitive sentence (it is intransitive because it does not have a direct object).
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