Ok this is my first tab so be kind.
this is the main riff of the song, it sounds better if you have some distortion as well
^Bend
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9---9---9---9---9---12---5---9---5---0--|
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[ Tab from: http://www.guitaretab.com/b/beatles/1251.html ]
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0---3---5---------0---3---5^------------|
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you have to get the timing on your own but it's very simple
also you can move it to the bottom E, but i think it sounds better on A
~Polaris Mercury