Present simple,present continuous,present perfect simple,pre

Present simple,present continuous,present perfect simple,pre present perfect simple and present perfect continuous 请问present simple,the present continuous,the present perfect这 Present Simple or Present Continuous? present simple和present continuous 的用法 Present simple和Present continuous分别是什么意思? prensent simple and present continuous, present perfect continuous和present perfect simple的区别与用法 present simple,present continuous ,past simple ,past continu present simple simple present simple present tense和present continuous tense各是什么时态?