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—______