I'm pretty sure this is exactly how Tegan plays it:Standard tuningChords are basically A, G and Bm but played with the top 2 strings open instead of as abar chord.Not sure if these have technical names so I'll write them as A, G and Bm but they areplayed like this:A = 577600 G = 355400 Bm = 799700So instead of barring with the index finger, fret the bottom E string with your thumb sothe top 2 strings are open.Majority of the song is just alternating from A to G. Take your hand completely offwhile changing chord and put in an up/down strum of the open strings in between, rather thansliding up and down.Then for "so... it's been so long since you said..." it's Bm, G, A.The Ocean - Tegan and SaraA GWhen you wake what is it that you think of most?AWhen your bed is empty do you really sleep alone?GIf I imagine you, body next to anotherA GAll around me, new love and it makes me sadAAll around me, feel assured that you'll be backGIf I imagine you, body next to another( Tab from: http://www.guitartabs.cc/tabs/t/tegan_and_sara/the_ocean_crd_ver_6.html )AStop crying to the oceanGStop crying over meAStop worrying over nothingGStop worrying over meBm G ASo it's been so long since you said,G"Well I know what I want, and what I want's right here with you"On the drive back here, I was worrying over nothingOn the drive back there, tears spilling over somethingWhen I imagine you, body next to anotherIn the door, and you're there, and you're sorry for the frightIn the door, can I hear you saying you don't wanna fight?When I imagine you, body next to anotherStop crying to the oceanStop crying over meStop worrying over nothingStop worrying over meSo it's been so long since you said"Well I know what I want, and what I want's right here with you"it's been so long since you said,"well I know what I want, and what I want's right here with you"In a flash it's back to you, just brought attention to the messIn a flash, you're on top, begging me to understandIf I imagine you, body next to anotherYou drop in for a minute and I'm sorry that I didn'tDrop in sooner just to see you and to see what you've been doingIf I imagine you, body next to anotherSo it's been so long since you said,"Well I know what I want, and what I want's right here with you"its been so long since you said.... repeat til the end
Source: http://www.guitartabs.cc/tabs/t/tegan_and_sara/the_ocean_crd_ver_6.html