17. To infinitive: .... V1: do V2: .... V3: .... V es/s: .... V ing: .... Artinya: .... 18. To infinitive: .... V1: .... V2: .... V3: .... V es/s: .... V ing: buying Artinya: .... 19. To infinitive: .... V1: .... V2: .... V3: .... V es/s: decides V ing: .... Artinya: .... 20. To infinitive: to wonder V1: .... V2: .... V3: .... V es/s: .... V ing: .... Artinya: ....

Pembahasan

Kata do dan buy tergolong ke dalam irregular verb sementara kata wonder dan decide tergolong ke dalam regular verb . Jadi, jawaban yang benar adalah: 17. To infinitive: to do V1: do V2: did V3: done V es/s: does V ing: doing Artinya: melakukan 18. To infinitive: to buy V1: buy V2: bought V3: bought V es/s: buys V ing: buying Artinya: membeli 19. To infinitive: to decide V1: decide V2: decided V3: decided V es/s: decides V ing: deciding Artinya: memutuskan 20. To infinitive: to wonder V1: wonder V2: wondered V3: wondered V es/s: wonders V ing: wondering Artinya: membayangkan