Solution
1)
| food | ME [o:] | EModE [u:] | PDE [u:] |
| boat | ME [ɔ:] | EModE [o:] | PDE [əʊ] |
| tide | ME [i:] | EModE [əi] | PDE [aɪ] |
| make | ME [æ:] | EModE [ɜ:]/EModE [e:] | PDE [eɪ] |
| green | ME [e:] | EModE [i:] | PDE [i:] |
| meat | ME [ɜ:] | EModE [e:] | PDE [i:] |
| house | ME [u:] | EModE [əʊ] | PDE [aʊ] |
2)
| muche | EModE [u] | PDE [ʌ] | Development belongs to: /u/ split into two phonemes |
| but | EModE [u] | PDE [ʌ] | Development belongs to: /u/ split into two phonemes |
| teachynge | EModE [ɜ:] | PDE [i:] | Development belongs to: GVS |
| greate | EModE [ɜ:] | PDE [eɪ] | Development belongs to: GVS |
| backewarde | EModE [ɒ] | PDE [æ] | Development belongs to: /ɒ/ became slightly closer |
3)
| ME [e:] | EModE [i:] | as in geese |
| ME [i:] | EModE [əi] | as in mice |
| ME [ɔ:] | EModE [o:] | as in stone |
| ME [ɑ:] | EModE [ɜ:] | as in name |
| ME [u:] | EModE [əʊ] | as in mouse |
| ME [o:] | EModE [u:] | as in moon |
| ME [ɜ:] | EModE [e:] | as in sea |