COMUNICATIVE GRAMMAR IIIPresent Perfect and Present Perfect Progressive Mgs. Paúl González T. 1
PRESENT PERFECT: SINCE and FOR (unit 16) You can use the present perfect to talk about things that happened at an indefinite time in the past.They’ve traveled to Manta. (You don’t know exactly when) 2 http://www.skyscraperlife.com
Use the present perfect with since or for to talk about something that began in the past and continues into the present (and may continue into the future). Roberto has been rich since 2005. 3 http://www.gratisblog.com/jovenes_con_poder/
Use since + point in time to show when something started.I have played chess since I was a child. Use for + length of time to show how long something has lasted.Joe has sold computers for a long time.
PRESENT PERFECT PROGRESSIVE AND PRESENT PERFECT (unit 19) We often use the present perfect to talk about how much someone has done, how many things someone has done, or how many times someone has done something.I’ve learned a lot about it.He’s written three articles.She’s read that article twice.
We can also use the present perfect progressive to talk about how long something has been happening.He’s been learning English for 6 months. http://enganchadaalasseries.blogspot.com/2009/11/do-you- understand.html
The present perfect progressive often shows that something is unfinished. It started in the past and is still continuing. The emphasis is on the continuation of the action.I’ve been reading a book about insects. (I’m still reading it.)
The present perfect often shows that something is finished. The emphasis is on the result of the action.I’ve read a book about insects. http://www.amazon.com/Insect-Plant-Biology-Louis-M-Schoonhoven/dp/0198525958
We often use the present perfect progressive to show that something is temporary.They’ve been living here since 1995, but they’re moving next month. We can use the present perfect to show that something is permanent.They’ve lived here since they were children. They’ve always lived there.
Sometimes you can use either the present perfect progressive or the present perfect. This is especially true with verbs such as live, study, teach, and work with for or since.He’s been working at UTPL for 6 years.He’s worked at UTPL for 6 years.