<bold><link type="page"><caption> 点击收听节目</caption><url href="http://www.bbc.co.uk/ukchina/simp/elt/2015/04/150430_qanda_342_past_simple_present_perfect ...

Question: Is there a difference between saying I have done my homework and I did my homework? The first sentence is in Present Perfect (have + 3rd form verb) and the second is in Past Simple (2nd form ...

To play this video you need to enable JavaScript. Do you have a question you want us to answer? You can send us your questions to [email protected] 1. We can use both present perfect and past ...

Present continuous and 'going to' Verb patterns The present perfect with ‘ever’ and ‘never’ The present perfect with 'for' and 'since' Comparatives and superlatives Present perfect with 'just', ...