Please tell me if I should use to or too in the following sentence: Anthony knew all (to, too) well that he shouldn't have eaten a third piece of lasagna.

That is the answer put on the test, but the teacher marked it wrong. I am so frustrated! Thank you.

Teachers make mistakes, too. Please ask her/him about this answer.

In the sentence you provided, the correct choice is "too." The sentence should be: "Anthony knew all too well that he shouldn't have eaten a third piece of lasagna." The word "too" in this context means "excessively" or "more than necessary."

In the sentence, "Anthony knew all (to, too) well that he shouldn't have eaten a third piece of lasagna," the correct word to use is "too."

To determine whether to use "to" or "too," let's break it down:

1. "To" is a preposition used to indicate direction or movement towards something. For example: "I'm going to the park."

2. "Too" is an adverb used to indicate excess or addition. For example: "I ate too much cake."

In this case, we are talking about Anthony's awareness of something in excess, which aligns with the meaning of "too." Therefore, the correct sentence is: "Anthony knew all too well that he shouldn't have eaten a third piece of lasagna."

Remember, when in doubt, it can be helpful to understand the definitions and usage of words to make the correct choice.