用法总结 Present continuous vs present simple 现在进行时和一般现在时 1. To talk about something that you are doing right now, use the present continuous tense. 描述 正在进行的动作，用 现在进行时。 I 'm drinking coffee. You 're ...

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 ...