The present perfect of be is contrasted with the continuous

The present perfect of be is contrasted with the continuous 请问present simple,the present continuous,the present perfect这 The present continuous tense Use the Present Continuous with Normal Verbs to express the past continuous/present continuous/present perfect continuou write the present continuous from of the following present perfect simple and present perfect continuous 现在完成进行时：The present perfect continuous是这样写的嘛? Complete it with the present perfect form of the verbs in pa 英语翻译the actual measured value for Rn is contrasted with the The present perfect tense 什么是PRESENT PERFECT CONTINUOUS啊?