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gather his thoughts collect his ideas use his thoughts collect his thoughts
told telling to be told to tell
understand understanding to understand understood
understand understanding to understand understood
had tried;must be tried;must be try;should be had tried;be
however no matter whatever although
to understand understand understood understanding
to come to come to life to come up to come up to
had tried, must be tried, must be try, should be had tried, be
will try tried has been trying has tried
understand understanding to understand understood