1）[i:] 字母组合:ee ea e ie three tree green sheep meet beef see seek eat tea meat leave lead teacher team mean speak clean please he she me piece receive ceiling 2) [i] 发音字母 i y e sit picture it is list six mix fix fit pig big build miss myth many twenty happy dictionary defect decide delicious

[开音节] be, me, we, he, she

[ea 组合] lead, read, cheap, heap

[ie组合] believe,blief,

[ey 组合]：key keyword keyboard keynote keystone

[eo 组合]：reopen reorganise reoccupy reoffer reorder

[oe 组合]：oecumenical oecumenicity oesophagus oesophageal oestrus