You use these expressions: WHILE / WHEN with:
A. Past Simple and Past Continuous
B. Past Simple and Past Perfect
C. Past Perfect and Present Perfect
Active vs. Passive Voice Active vs. Passive Voice Lend vs. Borrow Grammar, adverbs of frequency placementGrammar Present Perfect (ever never)SuperlativesSuperlative AdjectivesDemonstrative PronounModal Verbs and Conditionals
Other quiz: Vocabulary
C. Arrangement by rank
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