Diamondrg  +  221110 Sun, 30 Apr 06 08:55 AM 1- We've had to make some adjustments to our original calculations. (Longman) 2- We had to make some adjustments to our original calculations. I have written the second sentence. I have a few questions about the difference between the present perfect and the simple past. We do not always have to use a time adverb with the simple past, do we? What is the difference between the above sentences, especially with respect to meaning? Why do you use one instead of the other? Diamondrg Joined on Fri, Dec 2 2005 Contributing Member 1,043 Verbs, Difference Between, Adverbs, Simple Past, Present Perfect

	Mister Micawber  +  221134 Sun, 30 Apr 06 11:48 AM 1-- indicates the immediacy of the past event or relates the past event to the present or future.  Perhaps it goes on to say, '... so please be patient while we recalibrate our chronophores'. 2-- simple statement of the finished event.  'The task is completed'. Please keep in mind that we can say nothing concrete about the relative meanings of these two sentences in isolation.  Tense use depends on the context. Mister Micawber Joined on Wed, Aug 4 2004 Yokohama Veteran Member 30,753 'The question is,' said Humpty Dumpty, 'which is to be master-- that's all.' Tenses, Simple Past