By Tenses, Present perfect

Rule of thumb, don't use "since" with "ago" together. Since is used typically in present perfect tense, and ago is used in past tense.You can say " I have been suffering from insomnia for weeks. or I was suffering from insomnia 3 years ago.

.You are speaking of an event (school attendance) which began in the past, but has not yet been completed. Use past for those parts that are finished (e.g. completion of courses) and present perfect for those that are conceivably still happening now (e.g. pleasant time, making friends). Use...

Hi,I was listening to some types of speeches and have some questions.1.When someone says this, does he have to make it known that it is quoted? Not if he doesn't want to. Such 'rules' are not governed by grammar. A teacher, for example, may insist that a student identify every...

Hi,I was listening to some types of speeches and have some questions.1.When someone says this, does he have to make it known that it is quoted? I think the written version should be in quotation marks because not being in quotation marks doesn't make sense to me.Next time is later again.2.Can...

Hi, If I say: "You sent it to me", is that correct? Or do I have to say "You have sent it to me"? Let me ask you to consider these two examples.I cooked dinner. Describes a simple past event. Maybe I did this 30 minutes ago, or 30 years ago.I have cooked dinner. This describes...

Hello, everyone: For the phrase "in the past", "during the past ten years..." , and "within these few days" I've check my dictionaries and searched in the Internet, and I found that they tend to use "present perfect". So I'm wondering if they could...

.All such uses, when correctly applied, relate the past event to the present situation in some way-- that is the general boundary of the use of the present perfect verb aspect.The original poster wished to introduce a person, including indicating that the person was a college graduate: here,....

The "rule" of not mixing active and passive only applies where it is possible to make all the parts active or all passive. Further note that the example on that website is of a sentence of two independent clauses joined by "and". I don't think the "rule"...

He bought a parrot that the seller said it would repeat every word he uttered. Contented, he went home and but later found it didn't say a word. Furious, he went back to the owner and asked him what had happened. The owner answered that he had not lied (didn't lie OK??) to the man. The...

This is also correct, the difference being for the earlier one (in present continuous tense),the action of staying away is continuing while for this one (in present perfect tense), such action is in a completed state.