Double Bass How to play this in time?

[Papageno]

Here is a reference about rules for beaming notes together:
Note Beaming and Grouping in Music Theory

There are similar rules for tying notes, and for rests. The purpose of these rules is to enable to instantaneously and unambiguously identify the location of the mains beats. This is particularly important for orchestral music, which are normally read from the sheet in real time and not memorized.

 

[dperrott]

I don't think this was mentioned but clapping the rhythm can be a big help. Put a metronome on and clap it. If you can't clap it with out the instrument, you wont be able to play it on the instrument. You have to do it one step at a time. Get the rhythm first and then the notes, fingering, and bowing later.

 

[elberon]

I don't think this was mentioned but clapping the rhythm can be a big help. Put a metronome on and clap it. If you can't clap it with out the instrument, you wont be able to play it on the instrument. You have to do it one step at a time. Get the rhythm first and then the notes, fingering, and bowing later.

I totally agree, when I have to learn rhythmically difficult music I do what you advise first before even picking up my instrument. I've also found that snapping the beat with my left hand, conducting the meter's beat pattern with my right hand, and mouthing the sound "ta" on rhythmic attacks clarifies where the attacks are with respect to the beat. Obviously when you're actually playing the part you can't do all that but by then you should have a better sense of where to place things and how the rhythm's organized.