Answer:
A clause will always contain a subject.
Step-by-step explanation:
The subject in the sentence is doing or being something. It gives the action to the other verbs. The clause necessarily contains subject because it says what the sentence is about. There can be simple subjects as well as compound subjects in the clause determining the simplicity of the subject or so. Without the use of subject it is not possible to understand the meaning of the clause and derive its essence.