我的爸爸是高的并且强壮
My father is tall and strong.（肯定句）
My father isn't tall and strong.（否定句）
be的肯定形式为am，is，are。
否定形式为is't，aren't，am not。
其过去式的肯定形式为was，were。
其过去式的否定形式为wasn't，weren't。
例句：He was not in the school library yesterday afternoon.
例句：We were not at home last night.
My father isn’t tall and strong.
首先，这句话的陈述句是这样的，My father is tall and strong.
改成否定句，中间的is要改成isn’t或者is not，其他不变。My father isn’t tall and strong.
这里其实考核be动词的用法，它的三个变式am is are ，否定am not, is not , are not，很简单哦，只要学会应用，万变不离其宗。
