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Mary looks exhausted. What  

has she been doing all working day?

How long  

have they known their history teacher?

How many times  

has Tim visited Sidney?

Jess  

has been learning Spanish words for hours, but she still doesn't remember all of them.

Sorry, we are late.  

Have you been waiting for a long time?

Friends  

have been playing chess for several hours.

Has Nina been studying for a long time today?

My uncle  

has never played curling.

Dave  

hasn't seen his colleagues recently.

Melony  

has been writing the report all day, but she  

hasn't finished yet.

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