The girl is an excellent singer in the sentence above the word. is a predicate

The predicate in the sentence "The girl is an excellent singer"  is and excellent singer.

Explanation:

To determine the predicate of a sentence it helps to indentify the subject first. You can ask who is an excellent singer? the answer to the question is "the girl". The subjetct is the person or thing the sentence is about or who is doing the action. The question to know the predicate should be "what is the girl?" and the answer is "an excelent singer". The predicate refers to the action. The girl=subject

            Is an excellent singer= predicate

either online or traditional classroom can work for students. which is better will depend on students and teacher. students may have trouble following a lesson in classroom while they can study at their own pace online. other students may have trouble staying focus on their own in online classes. teachers are more used to classroom teaching but they may also be more worry about their jobs teaching online classes and work harder.

every four years the american people choose a new president, and 1988 is one of those years."