现在完成时否定I haven't seen it从来没有看见它I hadn't noticed 怎么一个个have 一个用had

现在完成时否定I haven't seen it从来没有看见它I hadn't noticed 怎么一个个have 一个用had
现在完成时否定
I haven't seen it从来没有看见它I hadn't noticed 怎么一个个have 一个用had

现在完成时否定I haven't seen it从来没有看见它I hadn't noticed 怎么一个个have 一个用had
I haven't seen it ,我从来没没见过它,表示过去现在都没见到过.
I hadn't noticed it ,我之前没注意到,表示过去没注意到,现在注意了.