We (learn ) E this time last week This is the first time I (be) here

=>

1. were learning ( this time last week-> quá khứ tiếp diễn (một thời điểm xác định trong quá khứ) )

2. have been ( this is the first time-> hiện tại hoàn thành: has/have+ PII)

ĐỀ: We (learn ) E this time last week

$\text{We were learning English this time last week}$

1. were learning (this time last week-> quá khứ tiếp diễn)

ĐỀ: This is the first time I (be) here

$\text{This is the first time I have been here}$

2. have been (this is the first time-> hiện tại hoàn thành)