～から（ずっと）, ～以来（ずっと）
since yesterday
♔基本since yesterday
昨日から
⦣ since＋過去の時点を示す名詞（句）.
since 2003
since 2003 （読み方: two thousand and three）
2003年以来
since then
since then
その時から, その時以来
since this morning [last summer]
since this morning [last summer]
今朝[この前の夏]から
I have lived here since 2019.
I have lived here since 2019 （読み方: twenty nineteen）.
2019年以来私はここに住んでいる.
⦣ since はふつうこのように現在完了かんりょう形とともに使われる. have助動❸
It has been raining since yesterday.
It has been raining since yesterday.
昨日からずっと雨が降っている.
Ten years have passed since then.=It is [It has been] ten years since then.
Ten years have passed since then.=It is [It has been] ten years since then.
その時から10年たった.
⦣ It は漠然ばくぜんと「時間」を表す. have助動❶ 
