what is the verb for this, "he should be more careful"

What do you think?

should

That's only partly right, Pete.

oh its should be.

Right. The verb is "should be."

The verb in the sentence "he should be more careful" is "be."

To identify the verb, you can follow these steps:
1. Read the sentence and locate the subject, which in this case is "he."
2. Look for words that indicate action or state of being. In this sentence, "be" is the verb.
3. Verify that the word you identified fits the subject and makes sense in the context of the sentence.

In this sentence, "should" is an auxiliary verb used to indicate obligation or advisability, but it is not the main verb. The main verb is "be," which indicates a state of being more careful.