有it is a must这种说法吗?是否应该去掉A?

有it is a must这种说法吗?是否应该去掉A? 有这种说法吗?How hard it is snowing take off it有这种说法吗 有没有What's color it is?这种说法. is your brother is有Is your brother is a teacher?这种说法吗 must后必须跟be吗?It must be a dog是正确的 It must is a dog是错的吧 what is you work 有这种说法吗what is you work 有这种说法吗 有这种说法吗,it is worthwhile to do?在下才疏学浅 确实没听过 worth a while to do 不过还是谢谢 blowoff 兄了 有by a air这种说法吗? 有take a taste这种说法吗? wear a smile有这种说法吗? 有It`s time for bed . 这种说法吗? 有hard as was it这种说法吗? 有没有What must we practise doing这种说法? it is a bad habit that staying up late =it is a bad habit to stay up late老师 这两句相等么第一个是同位语吧 有这种说法吧?it is a bad habit staying up late这个对么 英语中 ** is a must的用法请问这种是正规的英文吗?能否用在书面中? we'll go for a walk if is fine tomorrow,哪部分是主句,怎么看出那有这种说法吗？主句一般现在时表示一般将来时 有After school is over.=after school 这种说法吗主要是school is over前面能不能加after