2. Analysis

a. The students are not much interested in English class . About 68% of the students responded "They are a little bored or bored." On the other hand, about 9% of the students are interested in the English class. The teacher should try hard to make many students be interested in English class by using various materials. Especially students are interested in games and songs. So they need to be used in English classes properly.

b. The interest levels vary with different skills. Especially they are interested in listening and reading. They have been studying English more than 4 years, but they still have difficulties in writing. Writing is not easy for even native speakers. Anyway the teacher need to use various activities to increase writing activities.

c. As the important of English communication competence is emphasized, students think of speaking as the most important skill which they should have. They also think writing is important. Writing is closely related to speaking. When students increase writing abilities, they will increase speaking abilities.

d. Most of the students have study materials, but many of them don't seem to study them. As they have study materials, they can study efficiently when they study the textbook. Many students go to private institutes to study English. Some of those who do not go to private institutes don't seem to study English, even not an hour a week. About 34% students only do their homework and seldom study English. So, it is necessary to give them proper homework continuously and check them.

e. Many students, 57% of the students, want both English and Korean to be spoken in class. They seem to be pressured if English only is used English. The teacher should use easy English expressions as much as possible to help them improve their communication competence and motivate them with various activities.

f. Most students like to enjoy the activities about games and song. Therefore, the teacher give a chance to the students to speak out easy English at least in class. They can get rid of the fear of speaking English while they are engaged in the interesting activities.

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This is the analysis of a questionnaire.
Would you check any grammatical mistakes?

2. Analysis

a. The students are not much interested in English class. About 68% of the students responded<~~add comma "They are bored or a little bored." On the other hand, about 9% of the students are interested in the English class. The teacher should try hard to make sure that many students are interested in English class by using various materials. Students are especially interested in games and songs. So these strategies need to be used in English classes properly.

b. The interest levels vary with different skills. Students are especially interested in listening and reading. They have been studying English more than four years, but they still have difficulties in writing. Writing is not easy for even native speakers. Teachers need to use various activities to increase writing activities.

c. As the importance of competence in English communication is emphasized, students think of speaking as the most important skill which they should have. They also think writing is important. Writing is closely related to speaking. When students increase their writing abilities, they will increase their speaking abilities.

d. Most of the students have study materials, but many of them don't seem to study them even though they can study efficiently when they study the textbook. Many students go to private institutes to study English. Some of those who do not go to private institutes don't seem to study English, not even an hour a week. Only 34% of students do their homework, yet they seldom study English. So,<~~delete comma it is necessary to give them proper homework continuously and check their work.

e. About 57% of the students,<~~delete comma want both English and Korean to be spoken in class. They seem to be pressured if English only is used English<~~delete second use of "English". The teacher should use easy English expressions as much as possible to help them improve their communication competence and motivate them with various activities.

f. Most students like to enjoy the activities involving games and song. Therefore, the teacher give a chance to the students to speak out easy English at least in class.<~~This sentence doesn't follow the first sentence in its ideas. The second sentence needs to be referring to games and songs. They can get rid of the fear of speaking English while they are engaged in the interesting activities.

Based on the provided analysis of the questionnaire, here are some grammatical mistakes that can be corrected:

1. Sentence: "The teacher should try hard to make many students be interested in English class by using various materials."
Correction: "The teacher should try hard to generate interest in the English class among many students by using various materials."

2. Sentence: "When students increase writing abilities, they will increase speaking abilities."
Correction: "As students improve their writing abilities, their speaking abilities will also improve."

3. Sentence: "As they have study materials, they can study efficiently when they study the textbook."
Correction: "Since they have study materials, they can study effectively by using the textbook."

4. Sentence: "Many students go to private institutes to study English. Some of those who do not go to private institutes don't seem to study English, even not an hour a week."
Correction: "Many students attend private institutes to study English. However, those who do not go to private institutes seem to study English very little, sometimes less than an hour a week."

5. Sentence: "They seem to be pressured if English only is used English."
Correction: "They seem to feel pressured if English is the only language used in class."

6. Sentence: "The teacher should use easy English expressions as much as possible to help them improve their communication competence and motivate them with various activities."
Correction: "The teacher should use simpler English expressions as much as possible to assist students in enhancing their communication skills and motivate them through various activities."

Please note that these corrections are suggested to improve the grammatical structure of the sentences.