In Present perfect^x, Past tenses^x, Prepositions^x

Hoa Thai wrote: Dear all, First, I would like to thank you in advance for reading this rather lengthy post of mine. I do need to lay out my thinking and reasoning as wide as I can so you can best help me to untangle my own confusion...

Earlier today, I had posted a message concerning the very same issue. I had not been fortunate to have found this message thread beforehand. (Uh oh, here I am getting tangled up in verb tenses with the preceding sentence. I mixed pluperfect with present perfect. Groan.) So, are you saying that...

Hello　Optimus 'Since' is a preposition/conjunction to indicate a time point at which a time duration begins. Because in English, an event occurring at a time point in the past is commonly expressed in the past tense, <since past> is grammatically better than <since present perfect>....

1. Use of present perfect tense and simple past tense Speakers of American English generally use the present perfect tense (have/has + past participle) far less than speakers of British English. In spoken American English it is very common to use the simple past tense as an alternative in...

1.How much water does that tank..........? a) comprise b) include c) consist d) contain (I'm not sure between 'comprise' and 'contain') "comprise" takes as its object(s) persons or things that are constituent parts. "That tank comprises a lot of water" says that a lot of water is a...