Grammar

What is a sentence?

A sentence is a group of words that you say or write down. Sentences always start with a capital letter and usually end with a period. That doesn't mean that everything that starts with a capital letter and ends with a period is a sentence, though. For instance, look at this phrase: Guzzle Brian dog late.

Not only does it not make sense, but it's also not a real sentence. That's because all sentences need two parts: a subject and a predicate.

The subject is the main person or thing that the sentence is about. The predicate tells you what the subject is doing. It can also be a description of the subject. The subject and the predicate together create a complete thought.

For example, take a look at this sentence: Ned wrote me a letter. The subject here is Ned. The predicate is wrote me a letter, since that's what Ned is doing. This is a simple sentence, but others can be more complicated.

For instance, some sentences can have more than one action in the predicate, like this one.

Some sentences can have more than one subject:

Here's a sentence where the predicate describes the subject.

Click on the dot over the predicate in the sentence.

Try again!

This is the subject of the sentence. Remember, the subject is whoever the sentence is mainly about.

You're right!

This is the predicate. It tells you what the subject is doing.

Now take a look at this sentence.

What's the subject of this sentence? The subject of this sentence is whoever the speaker is talking to. This kind of subject is called the invisible you. That means that if you give an order or a command, the subject is always you, but you don't need to say that out loud. The person you're talking to probably knows you mean him or her.

If a question ends in an exclamation point, like our last example, someone is saying it with a lot of emphasis, or feeling. For instance, if you write I hate Mondays!,that shows that you really hate them.

Questions

Questions are sentences too. Some questions are like sentences that have been flipped around, like this:

Question: Is Fred there?

Regular Sentence: Fred is there.

Some questions also add special question words at the beginning, like this:

Where is Fred?

If you're having trouble finding the predicate in a question, you can always flip it around to make it into a regular sentence, like we did in the first two examples. You can also just take out the subject. Whatever is left will be the predicate, even if it isn't all in the same place in the sentence.

Unlike other sentences, questions don't end in periods or exclamation points. They always end in question marks.