I agree with your idea or opinion
Ich stimme dir zu (ikh shtimme deer tsu)
"I’m with you on that plan — it’s a good one."
"Ich stimme dir bei diesem Plan zu — das ist ein guter." (ikh shtimme deer bai deezem plan tsu das ist ayn guter)
To do what you promised to do.
feeling very worried or tense because of problems
to have a really good time
To fit perfectly.
to start something again in a new way
to start having doubts about a decision you have made