1. The general rules for articles are as follows: Use “a” or “an” with a singular-count noun when you mean “one of many,” “any,” or “in general.” Use “the” with any noun when the meaning is specific; for example, when the noun names the only one (or one) of a kind. Don't use “a,” “an,” or “the” with a non-count noun when you mean “any,” or “in general.”
2&5. An article is missing. “a” and “an” are different forms of the same word, the indefinite article that often precedes a noun. “a” is used before a noun that starts with a consonant sound (e.g., “s,” “t,” “v”). “an” is used before a noun that starts with a vowel sound (e.g., “a,” “o,” “i”). e.g. an apple, a delicious apple.
3. You are correct. You can also say, 'I occasionally feel envious of them, as many of them can speak several languages, whereas I have been working hard to improve my English proficiency for a long time.'
4. A spelling error is when there's a mistake in the spelling, while a spelling mistake is when there's an error in the spelling.

1. Commas are used in the following instances: after an introductory clause, after a lengthy introductory prepositional phrase or multiple introductory prepositional phrases, and after introductory verbal phrases, certain appositive phrases, or absolute phrases.
2. The preposition ‘with’ refers to what we use to do something: They opened the package with a knife. I'll tie it with some tape to keep it closed. He cleaned the table with a cloth he found in the kitchen. The preposition ‘to’ is a versatile little word that can be used to say many things. ‘to’ indicates a goal or a direction of movement, as well as a place of arrival.
3. It's only one woman.
4. "my' is a possessive pronoun while 'a' is an indefinite article.
5&7. The selected term should be in the plural tense to follow the rest of the sentence which happens to be in the plural format.
6. Subject-verb disagreement is a frequent error in writing, occurring when the verb conjugation does not align with the point of view (first, second, or third) and number (singular or plural) of the subject.

1. Use "give" with nouns that refer to physical actions. “Have” is a verb that means to possess something or to do something. For example, 'I have a car. ' or 'I have a pencil. '
2. An article is missing. “a” and “an” are different forms of the same word, the indefinite article that often precedes a noun. “a” is used before a noun that starts with a consonant sound (e.g., “s,” “t,” “v”). “an” is used before a noun that starts with a vowel sound (e.g., “a,” “o,” “i”). e.g. an apple, a delicious apple.
3. Use "the" when referring to something specific, be it an object, person, type of object or person, or a particular quality of an object or person. Neglecting to include it can pose challenges in discussing a specific object or person unless you resort to using words like "this," "that," or a proper noun.
4. You are heading in the right direction, but, it’s incomplete, and an additional component to the hanging sentence would be appropriate.
5. A preposition is missing. The preposition ‘with’ refers to what we use to do something: They opened the package with a knife. I'll tie it with some tape to keep it closed. He cleaned the table with a cloth he found in the kitchen.
6. Commas are used in the following instances: after an introductory clause, after a lengthy introductory prepositional phrase or multiple introductory prepositional phrases, and after introductory verbal phrases, certain appositive phrases, or absolute phrases.
7. The selected term is misplaced. Move it to the correct position in the sentence.
8. The -ing form emphasizes the verb itself. Present participles are used with auxiliary verbs to make continuous tenses. They are also used as adjectives, describing a person or thing as doing something.
9. A preposition is missing. The preposition ‘to’ is a versatile little word that can be used to say many things. ‘to’ indicates a goal or a direction of movement, as well as a place of arrival.
10. The selected term is misplaced. Move it to the correct position in the sentence.

1. An article is missing. “a” and “an” are different forms of the same word, the indefinite article that often precedes a noun. “a” is used before a noun that starts with a consonant sound (e.g., “s,” “t,” “v”). “an” is used before a noun that starts with a vowel sound (e.g., “a,” “o,” “i”). e.g. an apple, a delicious apple.
2&5. The selected term should be in the plural tense to follow the rest of the sentence which happens to be in the plural format.
3&4. Subject-verb disagreement is a frequent error in writing, occurring when the verb conjugation does not align with the point of view (first, second, or third) and number (singular or plural) of the subject.
6. The selected term is misplaced. Move it to the correct position in the sentence.
7. A preposition is missing. The preposition ‘about’ talks about the subject of something. About has a similar meaning to 'concerned with, concerning.
8. ‘their’ is the possessive form of the third-person plural pronoun “they.” It means “belonging to them” and is used to modify a noun.

1. A preposition is missing. The preposition ‘about’ talks about the subject of something. About has a similar meaning to 'concerned with, concerning.
2. The selected term is misplaced. Move it to the correct position in the sentence.
3. The preposition ‘about’ talks about the subject of something. About has a similar meaning to 'concerned with, concerning. The preposition ‘like’ makes comparisons or creates a frame of reference; use such as when you're listing specific examples. A good way to remember how to properly use like or such as in a sentence is to remember that like is used in similes; it's always used to compare something to something else.