What is/are the object(s) of the following sentence?: I will carry the groceries, if you carry the new microwave.
groceries and microwave
There are two clauses in the sentence above and one object in each clause.
The subject of a sentence is the person or thing that does the verb and the object of a sentence has the verb done to it. So in the main clause we would ask the question, what was carried? Groceries. So groceries is the object.
In the subordinate clause we would ask the same question, what was carried? Microwave. So Microwave is the object.
However, it is perfectly possible to have two objects in the same sentence. For example: I will carry the groceries and the microwave.