The woodpecker has been pecking at this tree.这个句子是什么时态?
The woodpecker has been pecking at this tree.这个句子是什么时态?
英语时态填空:1.he___[read]under the tree at this moment yesterday.
Have you ever been to shanghai?这个句子是什么时态
have/has+been to是什么时态
have/has/had加been是什么时态
have/has been是什么时态?请举例?
have/has been+过去分词是什么时态?
have has been 是什么时态的
have /has been doing 是什么时态
Has Tom been late,这是什么时态
they have been to university this morning?是什么时态的句子,不是说this m
How long have you been doing是什么时态的句子?这个时态怎样构成?