present continuous 现在进行时present simple 一般现在时past perfect 过去完成时past continuous 过去进行时present continuous 现在进行时present perfect continuous 现在完成进行时present perfect 现在完成时p...
present continuous 现在进行时present simple 一般现在时past perfect 过去完成时past continuous 过去进行时present continuous 现在进行时present perfect continuous 现在完成进行时present perfect 现在完成时p...