In Expressions^x, Clauses^x, Present perfect^x

You can't use the present perfect (e.g., have seen ) in the same sentence with an expression of a definite time. A before clause expresses definite time. So have seen doesn't go with before . You have to change have seen to saw (the simple past). I saw your father before I came here. I...

I've just checked it a few minutes ago. <------- This is ok, though. No. Strictly speaking (i.e., prescriptively -- Please don't harm me!), no present perfect tenses together with a mention of a particular time, including ago expressions and when , after , before , and similar time...

Congratualtions for your explanations. There are clear and the best i've found. Vos explicatons sont les plus pédagogiques que j'ai pu trouver à ce jour et je tiens tout particulièrement à vous en rendre hommage. Gérard. Forum: New: Common English Questions and Answers - Archived Posts...

Set 1: I don't think that fronting the clause solves any problem; but I also think the problem is slight, if it exists at all. The question of what is the subject of shipping is clear enough-- it is the same as the subject of send , i.e. implied you . The present perfect can be used...

Sir, IV - The present prefect used with "for" and "since" A. "for" is used with a period of time: for six days, for a long time. "for" is used with the simple past tense denotes a terminated period of time. (e.g) We lived there for ten years. ( but we don't live there now) "for"...

TO QUOTE CALIFORNIA JIM: 'There is more than one difference between the simple past and the present perfect. The simplest difference is the grammatical difference that the simple past can be used with expressions which signify a definite, particular time in the past. I wrote a letter...

There is more than one difference between the simple past and the present perfect. The simplest difference is the grammatical difference that the simple past can be used with expressions which signify a definite, particular time in the past. I wrote a letter yesterday. I wrote a letter at 7...