its the first time后面加什么時(shí)態(tài)

its the first time后面加現(xiàn)在完成時(shí)。
time
n. 時(shí)間；時(shí)代；次數(shù)；節(jié)拍；倍數(shù)
vt. 計(jì)時(shí)；測定…的時(shí)間；安排…的速度
adj. 定時(shí)的；定期的；分期的
例句：
The time fairly raced by.
時(shí)間過得真快。
We didnt have much time.
我們沒多少時(shí)間。