Thanks Bshaihab
Coud the sentence "I've taken a shower since last night" be equivalent to "I've been taking a shower since last night. ?"
Thanks
W[/QUOTE]
No. It is very unlikely that "you have been taking a shower since last night". This would mean that you started having a shower last night and you are still in the shower. Unless you are in the habit of staying in the shower for for several hours (!), then you can't say this.
As the previous poster said, it's still a little unusual to say "I've taken a shower since last night". If someone said you smell bad, you are more likely to tell them that you have had a shower and when you had it.
"You smell bad!"
"I don't understand why. I had a shower this morning."