Reaching an Agreement: Matching Sentence Parts 3. causes 4. were 5. believe 8. is 9. is 10. cause 91 Walk This Way Now you know the main rules of agreement, so the rest of this business must be a piece of cake. Not so fast. Follow these three steps to check whether subjects andverbs in your sentences really agree: 1. 2. 3. Find the sentence's subject. Figure out if the subject is singular or plural. Select the appropriate verb form to match the form of the subject. Here's where the problems occur: 1. 2. 3. Figuring out what is the subject. Figuring out if the subject is singular or plural. Selecting the appropriate verb form to match the form of the subject. Let's look at each step in the process. Hide and Seek Some subjects can be harder to find than Judge Crater, Bigfoot, or Jimmy Hoffa. Fore-most among