Etiology: incomplete ingredients and lack of subject.

In other words:

1. Through this activity, I got a great education.

This activity gave me a great education.

Discriminate and correct the formula of sick sentences;

At first glance, the ingredients are missing, and the missing ingredients should be filled.

Second, look at the improper collocation, and the improper place will be smooth.

Third, look at the improper word order and improper adjustment.

Fourth, look at the improper use of words and replace them with appropriate words.

Fifth, see if the meaning is repeated, and if it is repeated, drive it away.

Sixth, look at the contradiction in the sentence and take off the spear and shield to settle it.

Seven, look at the improper classification and put different things elsewhere.

Eight, see if the quotation is clear, and the unclear place should be clearly indicated.