例如There( )an apple on the table.一定要填is吗?如果填was行吗?

例如There( )an apple on the table.一定要填is吗?如果填was行吗? There is only ( ) apple on the table.括号里应该填an还是one?为什么? There was an apple on the table复数句 there is an apple on the table 改为复数形式 is there an apple on the table?否定回答 There is an apple on the table.否定句 is there an apple on the table.否定句 There is only an apple on the table.There is ____ ___ an app 在括号里填a,an,the或不填.There is（）orange on the table.( ) orange is there is a box on the table.ln the box,there is an apple.the There is an apple on the table.There is a fish in the lake.这 There is an apple on the table.It is yours.(合并成一句）There is a