I use the present perfect simple or present perfect continuous when…
A. I talk about an action that started in the past and finished in the past
B. I talk about an action that started in the present and finishes in the future
C. I talk about an action that started in the past and continues to the present

Random Topics:
Possessive Pronouns and Adjective PronounsModals for DeductionAdverb Clauses of TimeSimple Present Tense with Adverb of FrequencyGrammar-Present Continuous-Sentence MakingSimple Past TenseCoordinating ConjunctionsAdverbs and AdjectivesSuperlative AdjectivesVerb ConjugationOther quiz:
Grammar › ViewWhat’s the correct plural form of “phenomenon”?
A. phenomenons
B. phenomenas
C. phenomena
D. phenomenon’s
Noun Phrases and Verb Phrases › View
‘She did at least write to say thank you’. Which is the use of ‘did’?
A. emphasis
B. abbreviation
C. interrogation
Active vs. Passive Voice › ViewCan cigarettes be smoked in the patio of the restaurant?
A. This sentence is “Active.”
B. This sentence is “Passive.”
First Conditional › View
If you …. how to cook, …… dinner for me?
A. won´t learn / will you prepare
B. learnt / will you prepare
C. learns / will you prepare
D. learn / will you prepare