Common diphthongs
ay
like 'ay' in "say"
ai
like 'ay' in "say"
au
like 'awe'
ee
like 'ee' in "see"
ei
like 'ay' in "say"
ey
like 'ay' in "say", like 'ee' in "see"
ie
like 'ee' in "see"
oi
like 'oy' in "boy"
oo
like 'oo' in "food", like 'oo' in "good"
ou
like 'ow' in "cow", like 'oo' in "food", like 'o' in "cot"
ow
like 'ow' in "cow"
oy
like 'oy' in "boy"
ch
like 'ch' in "touch"
sh
like 'sh' in "sheep"
th
like 'th' in "this", like 'th' in "those"
gh
like 'f' in "fish"
ph
like 'f' in "fish"