bod - to be: future and future perfect tenses Use with 'yn' for future tense: "I will be washing" or "I will wash" "Will you be washing?" "I won't be washing" or "I won't wash" Use with 'wedi' for future perfect tense: "I will have washed" "Will I have washed?" "I won't have washed" affirmative bydda i byddi di bydd e bydd hi byddwn ni byddwch chi byddan nhw interogative yes fydda i? "bydda" fyddi di? "byddi" fydd e? "bydd" fydd hi? "bydd" fyddwn ni? "byddwn" fyddwch chi? "byddwch" fyddan nhw? "byddan" negative fydda i ddim fyddi di ddim fydd e ddim fydd hi ddim fyddwn ni ddim fyddwch chi ddim fyddan nhw ddim