Tenses: Simple + Continuous

I went, I was going, I have gone or I had gone to London three times. Which tense do you use in which situation?With eGrammar you can improve your English in one or two months.VERB TENSESDiagnostic test 1 + Table of formsPresent simple + continuous tensePast simple + continuous tenseFuture simple + continuous tensePresent perfect simple + continuousPast perfect simple + continuousFuture perfect simple + continuousENGLISH VERB FORMSDiagnostic test 2 + Table of formsGoing toPassive voiceTime clausesConditional sentencesIf clausesIndirect speechEnglish exercises with answers.Basic grammar rules with clear explanations and examples.