I shouldn't have ate it. Or I shouldn't have eaten it. What's the difference? The second sentence is present perfect so is the first sentence simple past tense?

what W hat is the difference between present tense and present perfect tense? Let me illustrate with the verb work . Present. I, you, we, they work he, she, it, who? works Present perfect. I, you, we, they have worked he, she, it, who?

I answered your question in another thread, Anon: http://www.englishforums.com/English/PassiveVoice/ljchm/post.htm

If your answer was "yes" to the above question, you will go to step 2. This is possible, but as an instruction the imperative would normally be used. If your answer was "yes", go to step 2. If you would, I will be happy. This

She's had to do a lot of work. = She has had to do a lot of work. "She has has to do a lot of work" doesn't make sense. It's Present Perfect tense here, which means you need the construction "to have + past participle". More examples: I have

Present perfect is used when an event takes place from the past up till now, particularly when the event first happened in the recent past. Present perfect is usually used when you want to emphasise that the timing of the event (being in the past)

Have you spoken with Jon recently ? "Recently" calls for present perfect context. Did you speak with Jon yesterda y (any past time marker)?

TN: If you wish to say that you heard about or were told about Jane's visit, many native speakers would prefer the present tense: Well, I SEE (that) Jane CAME by yesterday. If you use the present tense, "that" would definitely be

For most action verbs. present continuous refers to the present moment ('I am typing in this box') while simple present refers to an action that happens anytime in the past present and future ('I type in these boxes when I have free time').

2 I wish there was were a device you could point at people and you'd know what nationality they were from. nationality they were from. Present tense because where you are from is in the present even though it refers to an event in the past.