1.Christina and Christopher worked together and completed a project about astronomy.

simple subject and compound predicate?

2.Jennifer and her brother were not allowed to go to Great Adventure with the Jones family.

Compound subject and compound predicate

3. Take this to Grandmother's house;
imperative sentence with subject understood (I think)

"simple" anything = 1

"compound" anything = 2

Let me know what you think about #s 1 and 2.

#3 - correct

Then they are both then compound subject and compound predicate.

#1 has compound subject and compound verb.

Re-think #2.

Jennifer and her brother-Compound Subject

were not allowed to go- simple predicate? I thought that to go would be the 2nd predicate.

#2

Compound subject = correct

Simple verb = were allowed ("not" is an adverb)

The verb form "to go" is an infinitive, not a whole verb that can have a subject.

The correct answer would be compound subject and simple predicate then.

Yes, right.

i want excersis

1. To find the simple subject in the sentence, we need to identify the main noun or pronoun that the sentence is about. In this case, the simple subject is "Christina and Christopher," as they are the ones who performed the action of working together. The compound predicate can be identified by locating the verbs or verb phrases in the sentence. Here, the compound predicate is "worked together and completed a project about astronomy," as it consists of multiple actions connected by the coordinating conjunction "and."

2. In this sentence, we have a compound subject, as there are multiple nouns joined together by the coordinating conjunction "and." The compound subject here is "Jennifer and her brother," as they are the ones being mentioned and involved in the action. The compound predicate, similarly, consists of multiple actions connected by the coordinating conjunction "and." It is "were not allowed to go to Great Adventure with the Jones family."

3. This sentence is indeed an imperative sentence with an understood subject. Imperative sentences are commands or requests. In this case, the understood subject is "you" or the listener. The imperative verb or command is "Take." The complete sentence, with the understood subject included, would be "You take this to Grandmother's house."