In Present perfect^x, Verbs^x, Simple present^x

Hi,We have an estimated gain of $100 for value date 11/30/08.Could you please further explain why I can't say "have estimated"? I thought when you use the "have/has" + Past Participle it is consideredto be in the perfect tense?We HAVE ESTIMATED a gain of $100 on 11/30/08....

That's one of those BrE/AmE things, I think. Very generally, we form the negative with the "do" form for simple present and simple past. I run every morning, I don't run every morning. Certainly "I runn't" is wrong. I baked these cookies myself, I didn't...

Summary of drink... Verb forms of drink: drink, drinking, drank, drunkSimple present: I drink, you drink, he drinks...Simple past: I drank, you drankProgressive: I am drinking, I was drinking, I will be drinkingPresent perfect/progressive: I have drunk,... I have been drinkingPast...

Hi, Why would we consider the participle an adjective in the simple present and a verb in the present perfect?Sorry, that seat's been taken.What do we call it in the simple past?Sorry, that seat was taken.Is there no passive in the simple present? What am I missing? (I am devastated!)Many...

Hi, YSchneider. I am not a native speaker and this is indeed a tough grammar point for non-native speakers.Here is an extract from CGEL*: Did you lock the front door?

I have sometimes thought that I should go back. (Can I say "I sometimes think that I should go back."? Yes. If I can, will the meaning change? Yes.) I have never believed their theories. (Can I say "I never believe their theories."? Yes. If I can, will the meaning change? ...

Present Perfect is formed with the auxiliary have and the past participle of some verb: have seen, has done, have lived. Present Perfect Progressive is formed with the auxiliaries have and been and the present participle of some verb: have been seeing, has been doing, has been living.CJ

Hi everyone,I have a few grammar questions and I don't know how to answer them:Explain why the verb “To Be” is not a non-progressive verb?I know the simple present never talks about the present but what can be an exception to this rule?Why does the present tense not exist in English? What...

The pub's flyer has a typo.It should be "...who have helped make...". That is the present perfect of the verb 'help'. It could also be worded this way: "...who have helped to make...".The simple present tense would be this: "...who help (to) make...".