He always helps his mother cook dinner 如果改成否定形式怎么改,helps要不要改

He always helps his mother cook dinner 如果改成否定形式怎么改,helps要不要改 英语一般疑问句怎么改My sister often helps my mother cook dinner（改为一般疑问 Daming helps his mother cook dinner every day. He helps his mother（ ）｛cook｝ at home. he always helps his mother do some housework. Bob usually helps his mother (cook) supper cook 的正确形式 用所给词正确形式填空Bob usually helps his mother ____(cook) supper He often helps his mother---(do)homework. Lana always helps her mother to s___the dinner table 英语改成同义句`He often helps his mother do the housework.He often He always helps others.为什么helps要加s呢? He always helps me to study math.(改成同义句) He always helps me