Normal order in the past or looking back to an. Until more recently, Product XYZ had not been ready but Provider XYZ has However, when we look back from a certain time in the past to tell what had happened before, we use Past Perfect. Made changes to the product a while ago that address the issue and markets are now embracing the product.Īnd if the issue no longer exists, you could put ' address' into the past tense also.Īlternatively, you can replace the past time adjunct with one that extends time into the present and retain the present perfect: While some native speakers might find your original sentence marginally acceptable, you are safer using the past tense ( preterite): *Until more recently, Product XYZ had not been ready but in 2014 Provider XYZ has made changes to the product. The action still continuous now or there is a result in the present from the action. The present perfect is used to refer to actions which take place in an unfinished time period up to the time of speaking, and allows the speaker to link past. *Until more recently, Product XYZ had not been ready but last week Provider XYZ has made changes to the product. We use the Present Perfect Simple for an action or a state that began in the past and is connected with the present i.e. Usage: We use Present Perfect to talk about 1) experience 2) change 3). The problem here lies in the combination of a present tense (the present perfect) with an adjunct of past or finished time ( a while ago). Structure: auxiliary verb HAVE (present tense) + main verb (past participle V3). Until more recently, Product XYZ had not been ready but Provider XYZ There is no prohibition on using the past perfect and the present perfect in one statement.
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