1how long has your child cried => when............

2when did you last meet her =>when was......

3 how long have you researched this => when did.....

*help meeeeeeeeeeeee

`color{aqua}{\text{_Lunarzy}}`

`1` When did your child cry `?`

`2` When was the last time you met her `?`

`3` When did you researched this `?`

`-` When + did + S + V-inf + O `?` 

`->` How long + have/has + S + V3/Vpp + O `?`

1. When did your child cry?

2. When was the last time you met her?

3. When did you research this?

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When + did + S + V-inf +...?

How long + have/has + S + Ved/Vpll +...?