How long have you known your best friend?
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How long have you been working in your current job?
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How long ago was your last travel?
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How long have you studied English?
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How long have you been awake today?
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How long have you had/driven your car?
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How long ago did you last go shopping for clothes?
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How long have you had your current cell phone?
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How long ago did you last do some exercise?
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How long have you lived in your house?
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How long have you been able to ride a bike?
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How long have your liked your favourite TV show?
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How long have you been married?
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How long have you had your current hairstyle?
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How long have you been going to your favourite restaurant?
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