I don’t know how to ski, so I didn’t go skiing with Simon last week.
A. If I knew how to ski, I would go skiing with Simon last week.
B. If I would know how to ski, I would have gone skiing with Simon last week.
C. If I had known how to ski, I gone skiing with Simon last week.
D. If I knew how to ski, I would have gone skiing with Simon last week.

Random Topics:
Simple and Progressive Verb TensesInfinitives or GerundsPresent simple & ContinuousThe -ing Form of VerbsPast Tense & Present Perfect TenseComplex Sentences with Adverb ClausesDependent PrepositionsSimple, Compound, Complex SentencesPronoun-Verb AgreementGrammar MistakesOther quiz:
Present Simple & Present Continuous Tenses › ViewDo you know the man who _____ to my teacher?
A. talks
B. talked
C. is talking
D. was talking
Grammar › View
When there is a collective noun, the verb can be singular or plural, depending on whether the noun is referring to a group as a whole or to individual members of the group. What is the correct verb form to complete the sentence? The flock of birds (is/are) flying south.
A. Is
B. Are
C. Was
D. Were
Vocabulary › View Ryder’s first job as superintendent of the Kadoka Area School District was to make the dress code uniform in all 4 schools.
A. The same
B. Public
C. Proper
D. Lower
Present Tenses › View
Taylor: … your brother talked to you yet? Susan: Yes, he ….
A. Has / did
B. Have / have
C. Has / has
D. Did/did