is this sentence correct -- Andrew forgot his lunchbox at school everyday.

Technically, yes, but it doesn't really make sense. How could he continue to use his lunch box if he never brought it home?

No, the sentence is not correct. The correct sentence would be, "Andrew forgot his lunchbox at school every day."

To explain why, let's break down the sentence.

1. Andrew - This is the subject of the sentence, referring to a person named Andrew.

2. forgot - This is the verb, indicating the action that Andrew performed.

3. his lunchbox - This is the direct object of the sentence, specifying what Andrew forgot.

4. at school - This is a prepositional phrase, providing additional information about where Andrew forgot his lunchbox.

5. every day - This is another prepositional phrase, showing the frequency of Andrew forgetting his lunchbox.

The word "everyday" is an adjective used to describe something that is very common or ordinary. In this sentence, we need to use the phrase "every day," which means "each day" or "on a daily basis."