写出下列单词的相应形式。
A:例：work—works
⑴help— ______                  ⑵give—______
⑶watch—______                  ⑷close—______
⑸feed—______                   ⑹dance—______
⑺have—______                   ⑻fly—______
⑼study—______
B:例：sing—singing
⑴do—______              ⑵clean—______
⑶take—______            ⑷play—______
⑸look—______            ⑹swim—______
⑺get—______             ⑻eat—______
⑼skate—______