Had missed
missed is the simple past tense had missed is the past perfect tense
The word "miss" can be in the present tense, past tense, or future tense depending on the context of the sentence. For example, "I miss you" is present tense, "I missed you" is past tense, and "I will miss you" is future tense.
Missed is the past tense of miss.
The past tense is missed you.
The present perfect tense of missing is:I/You/We/They have missed.He/She/It has missed.
Existed is the past tense. The past perfect tense is had existed.
They're the same thing - the 'simple' is usually just missed out.Other forms of the past tense are:Past PerfectPast ContinuousPast Perfect Continuous
The past tense is bled, and the past perfect tense is had bled.
The past tense of sit is sat; the past perfect tense is had sat.
The past perfect tense of hope is had hoped.
The past perfect tense is had submitted.
The past perfect tense is had chosen.