Identify the interjection in the following sentence: Ouch! I stubbed my toe on the table leg.

Correct Answer: C

Rationale: The correct answer is C, 'ouch'. Interjections are words or phrases used to express strong emotions or sudden feelings. In this sentence, 'ouch' expresses pain, making it an interjection in the given context. Choices A, B, and D are incorrect as they do not represent interjections. 'Table' and 'leg' are nouns, while 'stubbed' is a past tense verb, none of which serve as interjections in this sentence.

Correct Answer: C

Rationale: In this context, 'study' is a verb, not a noun. 'Studied' is the past tense form of the verb 'study.' The plural form of a verb does not exist in the same way as it does for nouns. 'Studied' is the correct form for the past tense of 'study,' not a plural form. 'Studies' (choice A) is the third-person singular present tense form of 'study,' 'studying' (choice B) is the present participle form, and 'studier' (choice D) is not a correct form related to the verb 'study.' Therefore, 'studied' is the most appropriate choice here.

Correct Answer: C

Rationale: The present participle form of a verb is used to indicate continuous or ongoing action. In this case, 'running' is the present participle of the verb 'run.' It shows that the action is in progress, unlike the past tense 'ran' or the simple present 'runs.' 'Runner' is a noun derived from the verb but not the present participle form.

Correct Answer: C

Rationale: The correct answer is 'C: enthusiasm.' The noun form of the adjective 'enthusiastic' is 'enthusiasm.' Nouns are often formed from adjectives by changing the suffix; in this case, '-ic' in 'enthusiastic' changes to '-m' in 'enthusiasm.' 'Entusiastic' is an adjective and does not function as a noun. 'Enthusiastically' is an adverb as it describes how something is done, not a noun. 'Enthuse' is a verb and does not represent the noun form of 'enthusiastic.' It is important to understand the relationships between different parts of speech when analyzing word forms.

Correct Answer: B

Rationale: The correct answer is 'B' because in the present tense, the third-person singular form of the verb 'paint' is 'paints.' When conjugating verbs, it is essential to match the verb form with the subject. 'Paints' is the correct form for the third-person singular subject 'artist' in this sentence. Choices 'A,' 'C,' and 'D' are incorrect. 'A' is in the past tense, 'C' is a gerund form, and 'D' is a noun, not a verb form, which does not match the tense and subject in the sentence.