| Base Form | Past Simple | Past Participle | Gerund |
|---|---|---|---|
| obviate [ˈɑːbvɪeɪt] [ˈɒbvɪeɪt] | obviated [ˈɒbvɪeɪtɪd] [ˈɒbvɪeɪtɪd] | obviated [ˈɒbvɪeɪtɪd] [ˈɒbvɪeɪtɪd] | obviating [ˈɑːbvɪˌetɪŋ] [ˈɒbvɪeɪtɪŋ] |
| occupy [ˈɑːkjʊpaɪ] [ˈɒkjʊpaɪ] | occupied [ˈɑːkjʊpaɪd] [ˈɒkjʊpaɪd] | occupied [ˈɑːkjʊpaɪd] [ˈɒkjʊpaɪd] | occupying [ˈɑːkjəˌpaɪɪŋ] [ˈɒkjʊpaɪɪŋ] |
| occur [əˈkɜːr] [əˈkɜː] | occurred [əˈkɜːd] [əˈkɜːd] | occurred [əˈkɜːd] [əˈkɜːd] | occurring [əˈkɜːrɪŋ] [əˈkɜːrɪŋ] |
| off [ɔːf] [ɒf] | offed | offed | offing [ˈɔːfɪŋ] [ˈɒfɪŋ] |
| offend [əˈfend] [əˈfend] | offended [əˈfendɪd] [əˈfendɪd] | offended [əˈfendɪd] [əˈfendɪd] | offending [əˈfendɪŋ] [əˈfendɪŋ] |
| offer [ˈɔːfər] [ˈɒfə] | offered [ˈɒfərd] [ˈɒfəd] | offered [ˈɒfərd] [ˈɒfəd] | offering [ˈɔːfərɪŋ] [ˈɒf(ə)rɪŋ] |
| offload [ˌɔːfˈləʊd] [ˈɒfləʊd] | offloaded | offloaded | offloading |
| offset [ˈɔːfset] [ˈɒfset] | offsetted | offsetted | offsetting [ɒfˈsetɪŋ] [ɒfˈsetɪŋ] |
| omit [əˈmɪt] [əˈmɪt] | omited | omited | omiting |
| open [ˈəʊpən] [ˈəʊpən] | opened [ˈəʊpənd] [ˈəʊpənd] | opened [ˈəʊpənd] [ˈəʊpənd] | opening [ˈəʊpnɪŋ] [ˈəʊp(ə)nɪŋ] |
| operate [ˈɑːpəreɪt] [ˈɒpəreɪt] | operated [ˈɑːpəˌretəd] [ˈɒpəreɪtɪd] | operated [ˈɑːpəˌretəd] [ˈɒpəreɪtɪd] | operating [ˈɑːpəˌretɪŋ] [ˈɒpəreɪtɪŋ] |
| oppose [əˈpəʊz] [əˈpəʊz] | opposed [əˈpəʊzd] [əˈpəʊzd] | opposed [əˈpəʊzd] [əˈpəʊzd] | opposing [əˈpəʊzɪŋ] [əˈpəʊzɪŋ] |
| opt [ɑːpt] [ɒpt] | opted [ˈɑːptəd] [ˈɒptɪd] | opted [ˈɑːptəd] [ˈɒptɪd] | opting [ˈɑːptɪŋ] [ˈɒptɪŋ] |
| optimize [ˈɑːptɪmaɪz] [ˈɒptɪmaɪz] | optimized [ˈɒptəˌmaɪzd] [ˈɒptəˌmaɪzd] | optimized [ˈɒptəˌmaɪzd] [ˈɒptəˌmaɪzd] | optimizing |
| order [ˈɔːrdər] [ˈɔːdə] | ordered [ˈɔːrdərd] [ˈɔːdəd] | ordered [ˈɔːrdərd] [ˈɔːdəd] | ordering [ˈɔːrdərɪŋ] [ˈɔːdərɪŋ] |
| organise | organised | organised | organising |
| organize [ˈɔːrɡənaɪz] [ˈɔːɡ(ə)naɪz] | organized [ˈɔːrɡənaɪzd] [ˈɔːɡənaɪzd] | organized [ˈɔːrɡənaɪzd] [ˈɔːɡənaɪzd] | organizing [ˈɔːrɡəˌnaɪzɪŋ] [ˈɔːɡənaɪzɪŋ] |
| originate [əˈrɪdʒɪneɪt] [əˈrɪdʒɪneɪt] | originated [əˈrɪdʒəneɪtəd] [əˈrɪdʒəneɪtɪd] | originated [əˈrɪdʒəneɪtəd] [əˈrɪdʒəneɪtɪd] | originating [əˈrɪdʒəneɪtɪŋ] [əˈrɪdʒəneɪtɪŋ] |
| out [aʊt] [aʊt] | outed [ˈaʊtəd] [ˈaʊtɪd] | outed [ˈaʊtəd] [ˈaʊtɪd] | outing [ˈaʊtɪŋ] [ˈaʊtɪŋ] |
| outlaw [ˈaʊtlɔː] [ˈaʊtlɔː] | outlawed [ˈaʊˌtlɒd] [ˈaʊtlɔːd] | outlawed [ˈaʊˌtlɒd] [ˈaʊtlɔːd] | outlawing [ˈaʊˌtlɒɪŋ] [ˈaʊtlɔːɪŋ] |